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安卓开发的自制计算器源代码

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24点计算器源代码

24点计算器源代码
goto begin;
}
if((a*b)%c==0)
{if(a*b/c+d==24)
{printf("%d*%d/%d+%d=24\n",a,b,c,d);
getchar();
goto begin;
}
if(a*b/c-d==24)
getchar();
goto begin;
}
if(a+b+c-d==24)
{printf("%d+%d+%d-%d=24\n",a,b,c,d);
getchar();
goto begin;
}
if(a*b+c+d==24)
{printf("%d*%d+%d+%d=24\n",a,b,c,d);
SetScreen(0);
printf("请输入4个数字(1-13)");
for(num[aaa=0]=0;num[aaa=0]<1||num[aaa=0]>13;num[aaa=0]=inputn(20));
for(num[aaa=1]=0;num[aaa=1]<1||num[aaa=1]>13;num[aaa=1]=inputn(25));
long value;
char numberc[11];
char string[12];
row=start/20;
col=start%20;
strcpy(numberc,"0bnmghjtyu");
memset(string,0,12);

简易计算器(源码)

简易计算器(源码)

简易计算器（源码）以下是一个简易计算器的Python源码，用于执行基本的加、减、乘、除运算：```python#简易计算器def add(x, y):"""相加"""return x + ydef subtract(x, y):"""相减"""return x - ydef multiply(x, y):"""相乘"""return x * ydef divide(x, y):"""相除"""if y != 0:return x / yelse:return "除数不能为零！"print("选择操作：")print("1. 相加")print("2. 相减")print("3. 相乘")print("4. 相除")choice = input("输入你的选择（1/2/3/4）: ")num1 = float(input("输入第一个操作数: "))num2 = float(input("输入第二个操作数: "))if choice == '1':print(num1, "+", num2, "=", add(num1, num2))elif choice == '2':print(num1, "-", num2, "=", subtract(num1, num2)) elif choice == '3':print(num1, "*", num2, "=", multiply(num1, num2)) elif choice == '4':print(num1, "/", num2, "=", divide(num1, num2)) else:print("无效的选择")```以上代码中，我们定义了四个函数：`add`、`subtract`、`multiply`和`divide`，分别用于执行相加、相减、相乘和相除的操作。

计算器源代码

计算器源代码

#include<stdio.h>#include<iostream.h>#include<stdlib.h>#include<string.h>#include<ctype.h>typedef float DataType;typedef struct{DataType *data;int max;int top;}Stack;void SetStack(Stack *S,int n){S->data=(DataType*)malloc(n*sizeof(DataType)); if(S->data==NULL){printf("overflow");exit(1);}S->max=n;S->top=-1;}void FreeStack(Stack *S){free(S->data);}int StackEmpty(Stack *S){if(S->top==-1)return(1);return(0);}DataType Peek(Stack *S){if(S->top==S->max-1){printf("Stack is empty!\n");exit(1);}return(S->data[S->top]);}void Push(Stack *S,DataType item){if(S->top==S->max-1){printf("Stack is full!\n");exit(1);}S->top++;S->data[S->top]=item;}DataType Pop(Stack *S){if(S->top==-1){printf("Pop an empty stack!\n");exit(1);}S->top--;return(S->data[S->top+1]);}typedef struct{char op;int inputprecedence;int stackprecedence;}DataType1;typedef struct{DataType1 *data;int max;int top;}Stack1;void SetStack1(Stack1 *S,int n){S->data=(DataType1*)malloc(n*sizeof(DataType1)); if(S->data==NULL){printf("overflow");exit(1);}S->max=n;S->top=-1;}void FreeStack1(Stack1 *S){free(S->data);}int StackEmpty1(Stack1 *S){if(S->top==-1)return(1);return(0);}DataType1 Peek1(Stack1 *S){if(S->top==S->max-1){printf("Stack1 is empty!\n");exit(1);}return(S->data[S->top]);}void Push1(Stack1 *S,DataType1 item) {if(S->top==S->max-1){printf("Stack is full!\n");exit(1);}S->top++;S->data[S->top]=item;}DataType1 Pop1(Stack1 *S){if(S->top==-1){printf("Pop an empty stack!\n");exit(1);}S->top--;return(S->data[S->top+1]);}DataType1 MathOptr(char ch){DataType1 optr;optr.op=ch;switch(optr.op){case'+':case'-':optr.inputprecedence=1;optr.stackprecedence=1;break;case'*':case'/':optr.inputprecedence=2;optr.stackprecedence=2;break;case'(':optr.inputprecedence=3;optr.stackprecedence=-1;break;case')':optr.inputprecedence=0;optr.stackprecedence=0;break;}return(optr);}void Evaluate(Stack *OpndStack,DataType1 optr) {DataType opnd1,opnd2;opnd1=Pop(OpndStack);opnd2=Pop(OpndStack);switch(optr.op){case'+':Push(OpndStack,opnd2+opnd1);break;case'-':Push(OpndStack,opnd2-opnd1);break;case'*':Push(OpndStack,opnd2*opnd1);break;case'/':Push(OpndStack,opnd2/opnd1);break;}}int isoptr(char ch){if(ch=='+'||ch=='-'||ch=='*'||ch=='/'||ch=='(')return(1);return(0);}void Infix(char *str){int i,k,n=strlen(str);char ch,numstr[10];DataType opnd;DataType1 optr;Stack OpndStack;Stack1 OptrStack;SetStack(&OpndStack,n);SetStack1(&OptrStack,n);k=0;ch=str[k];while(ch!='=')if(isdigit(ch)||ch=='.'){for(i=0;isdigit(ch)||ch=='.';i++){numstr[i]=ch;k++;ch=str[k];}numstr[i]='\0';opnd= atof(numstr);Push(&OpndStack,opnd);}elseif(isoptr(ch)){optr=MathOptr(ch);while(Peek1(&OptrStack).stackprecedence>=optr.inputprecedence) Evaluate(&OpndStack,Pop1(&OptrStack));Push1(&OptrStack,optr);k++;ch=str[k];}else if(ch==')'){optr=MathOptr(ch);while(Peek1(&OptrStack).stackprecedence>=optr.inputprecedence) Evaluate(&OpndStack,Pop1(&OptrStack));Pop1(&OptrStack);k++;ch=str[k];}while(!StackEmpty1(&OptrStack))Evaluate(&OpndStack,Pop1(&OptrStack));opnd=Pop(&OpndStack);cout<<"你输入表达式的计算结果为"<<endl;printf("%-6.2f\n",opnd);FreeStack(&OpndStack);FreeStack1(&OptrStack);}void main(){cout<<"请输入你要计算的表达式,并以“=”号结束。

简易计算器代码

简易计算器代码
connect(button[9],SIGNAL(clicked()),this,SLOT(setOper()));
button[10] = new QPushButton(buttontext[10],this,buttontext[10]); // “—”
button[10]->setFixedSize(BUTTONWIDTH,BUTTONHEIGHT);
edit->setText(tr("%1").arg(0)); //这个函数可获取文本编辑框中光标的位置，并显示在状态栏中
//setText(tr(“%1行%2列”).arg(rowNum).arg(colNum));
initialize(); //调用初始化函数
}
void CWidget::initialize()
cwidget.cpp
#include "cwidget.h"
#define KEY_CLR "CLR"
#define KEY_ADD "+"
#define KEY_SUB "-"
#define KEY_MUL "*"
#define KEY_DIV "/"
#define KEY_EQ "="
#define KEY_0 "0"
{
delete edit;
delete *button;
delete mainLayout;
delete topLayout;
delete bottomLayout;
}
void CWidget::calculate() //响应按键“=”，调用计算功能

基于安卓的计算器的设计与实现

基于安卓的计算器的设计与实现

基于安卓的计算器的设计与实现在设计和实现基于安卓的计算器时，需要考虑以下几个重要的方面：用户界面设计、计算逻辑实现和功能扩展。

首先，用户界面设计是一个计算器的重要组成部分。

一个简洁直观、易于使用的界面可以提供良好的用户体验。

可以考虑使用标准计算器的布局，包括数字键盘、运算符按钮和显示结果的文本框。

此外，还可以添加一些额外的功能，比如一键清除按钮、括号按钮和科学计算模式切换按钮等。

考虑到不同屏幕尺寸和定制化需求，应该使用相对布局或者网格布局来放置UI元素。

其次，计算逻辑实现是计算器的核心部分。

需要支持基本的四则运算，包括加法、减法、乘法和除法。

为了实现连续运算和操作优先级，可以使用栈或者逆波兰表示法。

在用户输入数字和运算符时，应该及时更新显示结果的文本框。

另外，还应该考虑异常情况的处理，比如除数为零的情况。

最后，功能扩展是一个好的设计的关键。

除了基本的四则运算，还可以考虑添加一些其他功能，比如开方、求平方、取余、倒数、阶乘等。

另外，还可以添加一个历史记录功能，记录用户的计算过程和结果，方便用户查看和回顾。

此外，还可以添加一个单位转换功能，支持常见的长度、重量、温度、时间、速度等单位之间的转换。

在实际开发中，可以使用Android Studio作为开发工具。

Android Studio提供了丰富的界面设计工具和模拟器，可以方便地进行界面布局和调试。

可以使用Java语言进行开发，使用Android提供的API来处理用户输入和展示结果。

在代码实现中，可以使用按钮点击事件来处理用户输入。

当用户点击数字按钮时，将所点击的数字添加到一个临时变量中，当用户点击运算符按钮时，将临时变量中的数字和运算符添加到运算式中，并清空临时变量。

当用户点击等号按钮时，根据运算式中的数字和运算符进行实际的计算，并将结果显示在结果文本框中。

当用户点击清空按钮时，将运算式和结果文本框清空。

除了基本逻辑实现外，还可以进行一些优化和改进。

在Android Studio中开发一个简单的计算器应用

在Android Studio中开发一个简单的计算器应用

在Android Studio中开发一个简单的计算器应用随着智能手机的普及，计算器应用成为了人们生活中不可或缺的工具之一。

为了满足用户的需求，我们决定在Android Studio中开发一个简单的计算器应用。

这个应用将提供基本的四则运算功能，并且界面简洁易用。

首先，在Android Studio中创建一个新的项目。

选择合适的应用名称和包名。

接下来，我们需要设计应用的用户界面。

我们希望用户界面简洁明了，方便用户使用。

可以考虑使用一个TextView显示计算结果，以及多个Button用于输入数字和操作符。

在开发计算器的过程中，我们需要处理用户的输入并进行相应的计算。

为此，我们可以使用一个EditText控件来接收用户的输入，并通过按钮的点击事件来获取用户点击的数字和操作符。

然后，我们可以使用Java中的数学库来进行四则运算，并将结果显示在TextView中。

通过Android Studio提供的布局编辑器，我们可以轻松地将TextView和Button布局在界面上。

可以使用LinearLayout或RelativeLayout进行布局，根据需要设置各个控件之间的位置和大小。

此外，还可以设置按钮的点击事件，使其能够响应用户的输入。

在处理用户输入时，需要考虑一些特殊情况。

例如，当用户输入非法字符或进行除法时需要进行错误处理。

可以通过在代码中添加条件判断语句来实现这些功能。

另外，还可以添加一些额外的功能，如清除输入、撤销操作等，以提升用户体验。

在开发过程中，可以使用Android Studio提供的调试工具来检查代码是否正常运行。

可以设置断点，逐步执行代码，并查看变量的值。

这些工具能够帮助我们快速定位和修复错误。

为了使应用具有良好的用户体验，我们还可以添加一些动画效果和过渡效果。

例如，当用户点击按钮时，可以添加按钮缩放、淡入淡出等动画效果，使界面更加生动有趣。

除了基本功能以外，我们还可以考虑添加更多的功能来完善应用。

JAVA编写的计算器源代码

JAVA编写的计算器源代码

JAVA编写的计算器源代码// Calculator.javaimport javax.swing.*; // 引入swing库import java.awt.*; // 引入awt库import java.awt.event.*; // 引入awt.event库public class Calculator extends JFrame implements ActionListener//定义按钮private JButton zero;private JButton one;private JButton two;private JButton three;private JButton four;private JButton five;private JButton six;private JButton seven;private JButton eight;private JButton nine;private JButton point;private JButton equal; private JButton plus; private JButton minus; private JButton multiply; private JButton divide; private JButton backspace; private JButton ac;private JButton ce;private JButton sqrt; private JButton sqr;private JButton plus_minus; private JButton delete; private JButton sin;private JButton cos;private JButton tan;private JButton log;private JButton nfactorial; private JButton cubic; private JButton coln;private JButton factorial;//定义文本框private JTextField resulttext;// 定义boolean变量boolean clrdisp = true; // 昵称确定是否清除计算器显示boolean isCalculate = false; // 是否可以执行计算// 定义String变量，用于存储操作符String optr;//定义存储第一个操作数double num1;//初始化构造函数public Calculato//设置布局setLayout(new BorderLayout();//创建面板JPanel northPanel = new JPanel(;JPanel centerPanel = new JPanel(;JPanel southPanel = new JPanel(;//设置面板布局northPanel.setLayout(new FlowLayout(); centerPanel.setLayout(new GridLayout(4, 5)); southPanel.setLayout(new FlowLayout();//设置计算器显示resulttext = new JTextField(28); northPanel.add(resulttext);resulttext.setEditable(false);//初始化按钮zero = new JButton("0");one = new JButton("1");two = new JButton("2");three = new JButton("3");four = new JButton("4");five = new JButton("5");six = new JButton("6");seven = new JButton("7");eight = new JButton("8");nine = new JButton("9");point = new JButton(".");equal = new JButton("=");plus = new JButton("+");minus = new JButton("-"); multiply = new JButton("*"); divide = new JButton("/"); backspace = new JButton("<-"); ac = new JButton("AC");ce = new JButton("CE");sqrt = new JButton("sqrt");sqr = new JButton("sqr");plus_minus = new JButton("+/-");。

JAVA计算器源代码

JAVA计算器源代码

计算器源代码一、计算器源代码文件名：computer1.javaimport java.awt.*;import java.awt.event.*;public class computer1 extends Frame implements ActionListener{//声明窗口类并实现动作事件接口。

Button n0,n1,n2,n3,n4,n5,n6,n7,n8,n9;//声明数字按钮Button op,os,om,od,oe,oc;//声明操作按钮TextField tfd;//声明文本框String flg,rslt;//声明标志串、结果串Panel p1,p2,p3;//声明面板int i1,i2;float flt;computer1(){super("加减乘除计算器");n0 = new Button("0");//实现各按钮n1 = new Button("1");n2 = new Button("2");n3 = new Button("3");n4 = new Button("4");n5 = new Button("5");n6 = new Button("6");n7 = new Button("7");n8 = new Button("8");n9 = new Button("9");op = new Button("加");os = new Button("减");om = new Button("乘");od = new Button("除");oe = new Button("=");oc = new Button("c");tfd = new TextField(20);//实现文本框p1=new Panel();//实现各面板p2=new Panel();p3=new Panel();setLayout(new FlowLayout());//布局设计，用于安排按钮位置p1.add(n0);//将各数字按钮放入p1中p1.add(n1);p1.add(n2);p1.add(n3);p1.add(n4);p1.add(n5);p1.add(n6);p1.add(n7);p1.add(n8);p1.add(n9);p2.add(op);//将各操作按钮放入p2、p3中p2.add(os);p2.add(om);p2.add(od);p3.add(oe);p3.add(oc);setLayout(new BorderLayout());//布局设计，用于安排面板位置add("North",tfd);add("West",p1);add("Center",p2);add("East",p3);n0.addActionListener(this);//注册监听器到各按钮n1.addActionListener(this);n2.addActionListener(this);n3.addActionListener(this);n4.addActionListener(this);n5.addActionListener(this);n6.addActionListener(this);n7.addActionListener(this);n8.addActionListener(this);n9.addActionListener(this);op.addActionListener(this);os.addActionListener(this);om.addActionListener(this);od.addActionListener(this);oe.addActionListener(this);oc.addActionListener(this);addWindowListener(new closeWin());setSize(600,100);//确定窗口的尺寸setVisible(true);}public static void main (String args[]){new computer1();}public void actionPerformed(ActionEvent e){//处理鼠标事件的方法try{//异常处理if(e.getSource()==n0)//按数字键时tfd.setText(tfd.getText()+"0");if(e.getSource()==n1)tfd.setText(tfd.getText()+"1");if(e.getSource()==n2)tfd.setText(tfd.getText()+"2");if(e.getSource()==n3)tfd.setText(tfd.getText()+"3");if(e.getSource()==n4)tfd.setText(tfd.getText()+"4");if(e.getSource()==n5)tfd.setText(tfd.getText()+"5");if(e.getSource()==n6)tfd.setText(tfd.getText()+"6");if(e.getSource()==n7)tfd.setText(tfd.getText()+"7");if(e.getSource()==n8)tfd.setText(tfd.getText()+"8");if(e.getSource()==n9)tfd.setText(tfd.getText()+"9");if(e.getSource()==op){//按加号键时i1 = Integer.parseInt(tfd.getText());tfd.setText("");flg = "op";}if(e.getSource()==os){//按减号键时i1 = Integer.parseInt(tfd.getText());tfd.setText("");flg = "os";}if(e.getSource()==om){//按乘号键时i1 = Integer.parseInt(tfd.getText());tfd.setText("");flg = "om";}if(e.getSource()==od){//按除号键时i1 = Integer.parseInt(tfd.getText());tfd.setText("");flg = "od";}if(e.getSource()==oe){//按等号键时i2 = Integer.parseInt(tfd.getText());if(flg=="op"){rslt=Integer.toString(i1+i2);}if(flg=="os"){rslt=Integer.toString(i1-i2);}if(flg=="om"){rslt=Integer.toString(i1*i2);}if(flg=="od"){//除法需做小数处理flt=((float)i1)/((float)i2);rslt=Float.toString(flt);}tfd.setText(rslt);}if(e.getSource()==oc){//按清除键时tfd.setText("");flg = "";}}catch(Exception ex){}//扑捉到异常，但不进行处理}}class closeWin extends WindowAdapter{ //关闭窗口public void windowClosing(WindowEvent e){Frame frm=(Frame)(e.getSource());frm.dispose();System.exit(0);}}二、计算器界面三、修改后计算器界面。

计算器Android版源码

计算器Android版源码

100%运行通过这是自己编写的，通过eclipse运行简易计算器Android版（源码）这是自己整理得，欢迎大家下载说明：每完成一次计算后，需先clear 清除记忆，当然也可以连算XML布局<?xml version="1.0"encoding="utf-8"?><LinearLayout xmlns:android=android:layout_width="fill_parent"android:layout_height="fill_parent"android:orientation="vertical"><TableLayoutandroid:id="@+id/tableLayout1"android:layout_width="match_parent"android:layout_height="wrap_content"android:collapseColumns="4"><TableRowandroid:id="@+id/tableRow_et"android:layout_width="fill_parent"android:layout_height="fill_parent"><EditTextandroid:id="@+id/et"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_span="4"android:focusable="false"android:singleLine="true"android:inputType="text"android:gravity="right"></EditText></TableRow><TableRowandroid:id="@+id/tableRow1"android:layout_width="fill_parent"android:layout_height="fill_parent"><Buttonandroid:id="@+id/bt_7"android:layout_width="40px"android:layout_height="40px"android:text="7"/><Buttonandroid:id="@+id/bt_8"android:layout_width="40px"android:layout_height="40px"android:text="8"/><Buttonandroid:id="@+id/bt_9"android:layout_width="40px"android:layout_height="40px"android:text="9"/><Buttonandroid:id="@+id/bt_back"android:layout_width="40px"android:layout_height="40px"android:text="back"/></TableRow><TableRowandroid:id="@+id/tableRow2"android:layout_width="fill_parent"android:layout_height="fill_parent"> <Buttonandroid:id="@+id/bt_4"android:layout_width="40px"android:layout_height="40px"android:text="4"/><Buttonandroid:id="@+id/bt_5"android:layout_width="40px"android:layout_height="40px"android:text="5"/><Buttonandroid:id="@+id/bt_6"android:layout_width="40px"android:layout_height="40px"android:text="6"/><Buttonandroid:id="@+id/bt_divide"android:layout_width="40px"android:layout_height="40px"android:text="/"/></TableRow><TableRowandroid:id="@+id/tableRow3"android:layout_width="fill_parent"android:layout_height="fill_parent"> <Buttonandroid:id="@+id/bt_1"android:layout_width="40px"android:layout_height="40px"android:text="1"/><Buttonandroid:id="@+id/bt_2"android:layout_width="40px"android:layout_height="40px"android:text="2"/><Buttonandroid:id="@+id/bt_3"android:layout_width="40px"android:layout_height="40px"android:text="3"/><Buttonandroid:id="@+id/bt_multiply"android:layout_width="40px"android:layout_height="40px"android:text="*"/></TableRow><TableRowandroid:id="@+id/tableRow4"android:layout_width="fill_parent"android:layout_height="fill_parent"> <Buttonandroid:id="@+id/bt_0"android:layout_width="50px"android:layout_height="40px"android:text="0"/><Buttonandroid:id="@+id/bt_point"android:layout_width="50px"android:layout_height="40px"android:text="."/><Buttonandroid:id="@+id/bt_add"android:layout_width="50px"android:layout_height="40px"android:text="+"/><Buttonandroid:id="@+id/bt_sub"android:layout_width="50px"android:layout_height="40px"android:text="-"/></TableRow><TableRowandroid:id="@+id/tableRow4"android:layout_width="fill_parent"android:layout_height="fill_parent"><Buttonandroid:id="@+id/bt_equal"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_span="3"android:text="="/><Buttonandroid:id="@+id/bt_clear"android:layout_width="50px"android:layout_height="40px"android:text="clear"/></TableRow></TableLayout></LinearLayout>源代码：package android.sdk;importimportimportimportimportimportimportpublic class Android_calculatorActivity extends Activity {private Button bt_1;private Button bt_2;private Button bt_3;private Button bt_4;private Button bt_5;private Button bt_6;private Button bt_7;private Button bt_8;private Button bt_9;private Button bt_0;private Button bt_add;private Button bt_sub; // 减private Button bt_multiply; // 乘private Button bt_divide; // 除private Button bt_back;private Button bt_equal; // 等于private Button bt_point; // 点private Button bt_clear; // 清除private EditText et_play; // 显示private String str_oper = "+"; // 运算符private StringBuffer str_display = new StringBuffer();; // 显示private String str_result; // 结果显示private double num1;private double num2;private boolean flag = true; // 小数点个数开关控制；private boolean b_sub, b_mul, b_div; // 运算符开关控制@Overridepublic void onCreate(Bundle savedInstanceState){super.onCreate(savedInstanceState);setContentView(yout.main);bt_0 = (Button) findViewById(R.id.bt_0);bt_1 = (Button) findViewById(R.id.bt_1);bt_2 = (Button) findViewById(R.id.bt_2);bt_3 = (Button) findViewById(R.id.bt_3);bt_4 = (Button) findViewById(R.id.bt_4);bt_5 = (Button) findViewById(R.id.bt_5);bt_6 = (Button) findViewById(R.id.bt_6);bt_7 = (Button) findViewById(R.id.bt_7);bt_8 = (Button) findViewById(R.id.bt_8);bt_9 = (Button) findViewById(R.id.bt_9);bt_add = (Button) findViewById(R.id.bt_add);bt_sub = (Button) findViewById(R.id.bt_sub);bt_multiply = (Button) findViewById(R.id.bt_multiply);bt_divide = (Button) findViewById(R.id.bt_divide);bt_back = (Button) findViewById(R.id.bt_back);bt_equal = (Button) findViewById(R.id.bt_equal);bt_point = (Button) findViewById(R.id.bt_point);bt_clear = (Button) findViewById(R.id.bt_clear);et_play = (EditText) findViewById(R.id.et);et_play.setText("0.0");bt_0.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v){}});bt_1.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v){str_display.append("1");et_play.setText(str_display.toString());}});bt_2.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v){str_display.append("2");et_play.setText(str_display.toString());}});bt_3.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v){str_display.append("3");et_play.setText(str_display.toString());}});bt_4.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v){str_display.append("4");et_play.setText(str_display.toString());}});bt_5.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v){}});bt_6.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v){str_display.append("6");et_play.setText(str_display.toString());}});bt_7.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v){str_display.append("7");et_play.setText(str_display.toString());}});bt_8.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v){str_display.append("8");et_play.setText(str_display.toString());}});bt_9.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v){str_display.append("9");et_play.setText(str_display.toString());}});bt_point.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v){if (flag){str_display.append(".");flag = false;}}});bt_back.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v){if (str_display.length() != 0){str_display.deleteCharAt(str_display.length() - 1);et_play.setText(str_display.toString());}}});bt_add.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v){str_oper = "+";if (!(str_display.toString() == "")){num1 += Double.parseDouble(str_display.toString());str_display = new StringBuffer("");}if (!(str_result == null)){num1 = Double.parseDouble(str_result);str_result = null;}et_play.setText(String.valueOf(num1));flag = true;}});bt_sub.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v){str_oper = "-";if (!b_sub && !(str_display.toString() == "")){num1 = Double.parseDouble(str_display.toString());et_play.setText(String.valueOf(num1));str_display = new StringBuffer("");b_sub = true;} else{if (!(str_display.toString() == "")){num1 -= Double.parseDouble(str_display.toString());str_display = new StringBuffer("");}if (!(str_result == null)){num1 = Double.parseDouble(str_result);str_result = null;}et_play.setText(String.valueOf(num1));}flag = true;}});bt_multiply.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v){str_oper = "*";if (!b_mul && !(str_display.toString() == "")){num1 = Double.parseDouble(str_display.toString());et_play.setText(String.valueOf(num1));str_display = new StringBuffer("");b_mul = true;} else{if (!(str_display.toString() == "")){num1 *= Double.parseDouble(str_display.toString());str_display = new StringBuffer("");}if (!(str_result == null)){num1 = Double.parseDouble(str_result);str_result = null;}et_play.setText(String.valueOf(num1));}flag = true;}});bt_divide.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v){str_oper = "/";if (!b_div && !(str_display.toString() == "")){num1 = Double.parseDouble(str_display.toString());et_play.setText(String.valueOf(num1));str_display = new StringBuffer("");b_div = true;} else{if (!(str_display.toString() == "")){if (Double.parseDouble(str_display.toString()) == 0){Toast.makeText(Android_calculatorActivity.this,"除数不能为0！", Toast.LENGTH_LONG).show();} else{num1 /= Double.parseDouble(str_display.toString());str_display = new StringBuffer("");}}if (!(str_result == null)){num1 = Double.parseDouble(str_result);str_result = null;}et_play.setText(String.valueOf(num1));}flag = true;}});bt_clear.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v){str_oper = "+";str_display = new StringBuffer("");str_result = null;num1 = 0;num2 = 0;flag = true;b_sub = false;b_mul = false;b_div = false;et_play.setText("0.0");}});bt_equal.setOnClickListener(new OnClickListener(){@Overridepublic void onClick(View v){if (str_oper.equals("+")){num2 = Double.parseDouble(str_display.toString());str_result = String.valueOf((num1 + num2));et_play.setText(str_result);str_display = new StringBuffer("");}if (str_oper.equals("-")){num2 = Double.parseDouble(str_display.toString());str_result = String.valueOf((num1 - num2));et_play.setText(str_result);str_display = new StringBuffer("");}if (str_oper.equals("*")){num2 = Double.parseDouble(str_display.toString());str_result = String.valueOf((num1 * num2));et_play.setText(str_result);str_display = new StringBuffer("");}if (str_oper.equals("/")){num2 = Double.parseDouble(str_display.toString());if (!(num2 == 0)){str_result = String.valueOf((num1 / num2));et_play.setText(str_result);} else{Toast.makeText(Android_calculatorActivity.this,"除数不能为0！", Toast.LENGTH_LONG).show();}str_display = new StringBuffer("");}}});}。

android开发计算器设计开发报告

android开发计算器设计开发报告

a n d r o i d开发计算器设计开发报告Revised by Petrel at 2021《安卓开发》程序设计报告题目简单计算器开发专业(班级)网工111班姓名张波波学号指导教师赵（老师）日期2014.5.7目录一、设计说明： (4)1.设计内容：Android简单应用程序开发，简单计算器。

(4)2程序说明： (4)二、开发环境： (4)三、概要设计： (4)3.1系统的总体 (4)四、程序流程和系统功能设计 (5)4.1程序流程设计 (5)4.2.系统功能设计 (6)4.3基于Android平台系统具体设计 (6)4.3.1总体模块详细设计 (6)4.3.2输入模块详细设计 (6)4.3.3显示模块详细设计 (7)4.3.4计算模块详细设计 (7)五、计算器系统实现 (8)5.1Android应用程序构成 (8)六、截图说明 (9)1、图标 (9)2界面 (9)3运算界面 (9)4错误输入 (9)5设计平台界面 (9)6签名导出apk (9)七、总结 (9)课程设计任务书一、设计说明：1.设计内容：Android简单应用程序开发，简单计算器。

2程序说明：1、计算器界面友好，方便使用。

2、具有基本的加、减、乘、除功能，还有+—、开方、平方功能。

3、能够判断用户输入运算数是否正确。

4、4、支持小数运算。

5、具有退格功能，能够删除最后一个输入，ce。

6、具有清除功能，删除所有，c。

7、具有结果存储功能，能够显示存储器状态，支持触屏手机。

8、9、支持最低版本2.0，最高版本4.4。

开发时为4.2二、开发环境：开发环境：本系统是采用Eclipse+EclipseMe+JDK+ADT作为开发平台。

事实上为了节约时间就直接用Google公司安给的直接绑定好的adt-bundle-windows-x86_64开发，只需要配置下环境变量，无需要关联等操作。

三、概要设计：3.1系统的总体整个程序基于android技术开发，出总体模块外主要分为输入模块、显示模块以及计算模块（包括一些其她功能）这三大部分。

java简易计算器完整代码

java简易计算器完整代码

java简易计算器完整代码import java.awt.BorderLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JOptionPane;import javax.swing.JPanel;import javax.swing.JTextField;public class Calculate extends JFrame implements ActionListener {/****/private static final long serialVersionUID = 1L;/*** @param args*/float userFloata=0f;float userFloatb=0f;double result;JLabel label1 ;JLabel label2;JLabel label3;JTextField textField1;JTextField textField2;JTextField textField3;JButton addButton;JButton subtractButton;JButton rideButton;JButton divideButton;public Calculate(){setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);setTitle("简易计算器");JPanel viewJPanel_1=new JPanel();JPanel viewJPanel_2=new JPanel();addButton=new JButton("加");addButton.addActionListener(this);viewJPanel_1.add(addButton);subtractButton=new JButton("减");subtractButton.addActionListener(this);viewJPanel_1.add(subtractButton);rideButton=new JButton("乘");rideButton.addActionListener(this);viewJPanel_1.add(rideButton);divideButton=new JButton("除");divideButton.addActionListener(this);viewJPanel_1.add(divideButton);label1=new JLabel("数据1：");viewJPanel_2.add(label1);textField1=new JTextField(5);textField1.addActionListener(this);viewJPanel_2.add(textField1);label2=new JLabel("数据2：");viewJPanel_2.add(label2);textField2=new JTextField(5);textField2.addActionListener(this);viewJPanel_2.add(textField2);label3=new JLabel("结果是：");viewJPanel_2.add(label3 );textField3=new JTextField(5);viewJPanel_2.add(textField3);setSize(420,120);setVisible(true);validate();getContentPane().add(viewJPanel_1,BorderLayout.NORTH);getContentPane().add(viewJPanel_2,BorderLayout.CENTER);}public void CalculateEventHandel(){try{userFloata= Float.parseFloat(textField1.getText().trim());userFloatb= Float.parseFloat(textField2.getText().trim());} catch (NumberFormatException e) {JOptionPane.showMessageDialog(this, "请输入数字型数据！");textField1.setText("");textField1.requestFocus();textField2.setText("");textField3.setText("");return;}}public static void main(String[] args) { // TODO Auto-generated method stubnew Calculate();//a.CalculateEventHandel();}public void actionPerformed(ActionEvent e) { // TODO Auto-generated method stubif(e.getSource()==addButton){this.CalculateEventHandel();result=userFloata+userFloatb;// System.out.println(""+result);textField3.setText(""+result);}else if(e.getSource()==subtractButton){ this.CalculateEventHandel();result=userFloata-userFloatb;textField3.setText(""+result);}else if(e.getSource()==rideButton){this.CalculateEventHandel();result=userFloata*userFloatb;textField3.setText(""+result);}else if(e.getSource()==divideButton){this.CalculateEventHandel();result=userFloata/userFloatb;textField3.setText(""+result);}}}。

科学计算器源代码

科学计算器源代码

科学计算器源代码以下是一个简单的科学计算器的源代码，包含了基本的数学运算、三角函数、指数和对数运算、阶乘和组合运算等功能。

```#include <iostream>#include <cmath>using namespace std;//计算器类class ScientificCalculatorpublic://基本运算double add(double a, double b)return a + b;}double subtract(double a, double b)return a - b;}double multiply(double a, double b)return a * b;}double divide(double a, double b)if (b != 0)return a / b;} elsecout << "Error: Division by zero!" << endl; return 0;}}//三角函数运算double sine(double angle)return sin(angle);}double cosine(double angle)return cos(angle);}double tangent(double angle)return tan(angle);}//指数和对数运算double exponent(double x) return exp(x);}double logarithm(double x) return log10(x);}//阶乘运算double factorial(int n)if (n == 0)return 1;} elseint result = 1;for (int i = 1; i <= n; i++) result *= i;}return result;}}//组合运算if (n >= r)return factorial(n) / (factorial(r) * factorial(n - r));} elsecout << "Error: Invalid input!" << endl;return 0;}}};//主函数int maiScientificCalculator calculator;//进行一些简单的计算cout << "Addition: " << calculator.add(5, 3) << endl;cout << "Subtraction: " << calculator.subtract(5, 3) << endl;cout << "Multiplication: " << calculator.multiply(5, 3) << endl;cout << "Division: " << calculator.divide(5, 3) << endl;//三角函数运算cout << "Sine: " << calculator.sine(0.5) << endl;cout << "Cosine: " << calculator.cosine(0.5) << endl;cout << "Tangent: " << calculator.tangent(0.5) << endl;//指数和对数运算cout << "Exponent: " << calculator.exponent(2) << endl;cout << "Logarithm: " << calculator.logarithm(100) << endl;//阶乘和组合运算cout << "Factorial: " << calculator.factorial(5) << endl;return 0;```这个科学计算器的源代码使用了面向对象的编程思想，将不同的数学运算封装成类的成员函数。

计算器源代码

计算器源代码

这几天在做一个小计算器，经过两天的调试终于算是做完了（可能还有小Bug）。

最多可以到10的15次方。

源代码如下（源码我已经放到Skydrive上了，点这里下载)：// CalculatorDlg.cpp : implementation file//#include "stdafx.h"#include "Calculator.h"#include "CalculatorDlg.h"#include "math.h"#ifdef _DEBUG#define new DEBUG_NEW#endif// CAboutDlg dialog used for App AboutDisplay *Pdisplay;class CAboutDlg : public CDialog{public:CAboutDlg();// Dialog Dataenum { IDD = IDD_ABOUTBOX };protected:virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support// Implementationprotected:DECLARE_MESSAGE_MAP()};CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD){}void CAboutDlg::DoDataExchange(CDataExchange* pDX){CDialog::DoDataExchange(pDX);}BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)END_MESSAGE_MAP()// CCalculatorDlg dialogCCalculatorDlg::CCalculatorDlg(CWnd* pParent /*=NULL*/): CDialog(CCalculatorDlg::IDD, pParent), Cal_display(_T("WELCOME")){m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);Pdisplay=new Display(this);}void CCalculatorDlg::DoDataExchange(CDataExchange* pDX){CDialog::DoDataExchange(pDX);DDX_Text(pDX, IDC_EDIT1, Cal_display);}BEGIN_MESSAGE_MAP(CCalculatorDlg, CDialog)ON_WM_SYSCOMMAND()ON_WM_PAINT()ON_WM_QUERYDRAGICON()//}}AFX_MSG_MAP// ON_WM_KEYDOWN()ON_BN_CLICKED(IDOK, &CCalculatorDlg::OnBnClickedOk)ON_BN_CLICKED(IDCANCEL, &CCalculatorDlg::OnBnClickedCancel)ON_BN_CLICKED(IDCANCEL2, &CCalculatorDlg::OnBnClickedCancel2) ON_BN_CLICKED(IDOK4, &CCalculatorDlg::OnBnClickedOk4)ON_BN_CLICKED(IDOK6, &CCalculatorDlg::OnBnClickedOk6)ON_BN_CLICKED(IDOK2, &CCalculatorDlg::OnBnClickedOk2)ON_BN_CLICKED(IDCANCEL3, &CCalculatorDlg::OnBnClickedCancel3) ON_BN_CLICKED(IDOK3, &CCalculatorDlg::OnBnClickedOk3)ON_BN_CLICKED(IDCANCEL4, &CCalculatorDlg::OnBnClickedCancel4) ON_BN_CLICKED(IDCANCEL6, &CCalculatorDlg::OnBnClickedCancel6) ON_BN_CLICKED(IDCANCEL5, &CCalculatorDlg::OnBnClickedCancel5) ON_BN_CLICKED(IDCANCEL8, &CCalculatorDlg::OnBnClickedCancel8) ON_BN_CLICKED(IDCANCEL9, &CCalculatorDlg::OnBnClickedCancel9) ON_BN_CLICKED(IDCANCEL7, &CCalculatorDlg::OnBnClickedCancel7) ON_BN_CLICKED(IDOK5, &CCalculatorDlg::OnBnClickedOk5)ON_BN_CLICKED(IDOK7, &CCalculatorDlg::OnBnClickedOk7)ON_BN_CLICKED(IDCANCEL10, &CCalculatorDlg::OnBnClickedCancel10) ON_BN_CLICKED(IDOK8, &CCalculatorDlg::OnBnClickedOk8)ON_BN_CLICKED(IDCANCEL12, &CCalculatorDlg::OnBnClickedCancel12)ON_BN_CLICKED(IDCANCEL11, &CCalculatorDlg::OnBnClickedCancel11)ON_BN_CLICKED(IDOK9, &CCalculatorDlg::OnBnClickedOk9)ON_BN_CLICKED(IDCANCEL13, &CCalculatorDlg::OnBnClickedCancel13)ON_BN_CLICKED(IDOK10, &CCalculatorDlg::OnBnClickedOk10)ON_BN_CLICKED(IDCANCEL15, &CCalculatorDlg::OnBnClickedCancel15)ON_BN_CLICKED(IDCANCEL14, &CCalculatorDlg::OnBnClickedCancel14)ON_WM_KEYUP()END_MESSAGE_MAP()// CCalculatorDlg message handlersBOOL CCalculatorDlg::OnInitDialog(){CDialog::OnInitDialog();// Add "About..." menu item to system menu.// IDM_ABOUTBOX must be in the system command range.ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);ASSERT(IDM_ABOUTBOX < 0xF000);CMenu* pSysMenu = GetSystemMenu(FALSE);if (pSysMenu != NULL){CString strAboutMenu;strAboutMenu.LoadString(IDS_ABOUTBOX);if (!strAboutMenu.IsEmpty()){pSysMenu->AppendMenu(MF_SEPARATOR);pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);}}// Set the icon for this dialog. The framework does this automatically // when the application's main window is not a dialogSetIcon(m_hIcon, TRUE); // Set big iconSetIcon(m_hIcon, FALSE); // Set small icon// TODO: Add extra initialization herereturn TRUE; // return TRUE unless you set the focus to a control}//--------------------------------------------------------------------------------------------------//void CCalculatorDlg::OnKeyDown(UINT nChar,UINT nRepCnt,UINT nFlags) //{//int a=1;//CDialog::OnKeyDown(nChar, nRepCnt, nFlags);//}//void CCalculatorDlg::OnKeyUp(UINT nChar, UINT nRepCnt, UINT nFlags) //{// int a=1;//// CDialog::OnKeyUp(nChar, nRepCnt, nFlags);//}void CCalculatorDlg::OnSysCommand(UINT nID, LPARAM lParam){if ((nID & 0xFFF0) == IDM_ABOUTBOX){CAboutDlg dlgAbout;dlgAbout.DoModal();}else if(nID==SC_CLOSE){CCalculatorDlg::OnOK();}else{CDialog::OnSysCommand(nID, lParam);}}// If you add a minimize button to your dialog, you will need the code below// to draw the icon. For MFC applications using the document/view model, // this is automatically done for you by the framework.void CCalculatorDlg::OnPaint(){if (IsIconic()){CPaintDC dc(this); // device context for paintingSendMessage(WM_ICONERASEBKGND, reinterpret_cast<WPARAM>(dc.GetSafeHdc()), 0);// Center icon in client rectangleint cxIcon = GetSystemMetrics(SM_CXICON);int cyIcon = GetSystemMetrics(SM_CYICON);CRect rect;GetClientRect(&rect);int x = (rect.Width() - cxIcon + 1) / 2;int y = (rect.Height() - cyIcon + 1) / 2;// Draw the icondc.DrawIcon(x, y, m_hIcon);}else{CDialog::OnPaint();}}// The system calls this function to obtain the cursor to display while the user drags// the minimized window.HCURSOR CCalculatorDlg::OnQueryDragIcon(){return static_cast<HCURSOR>(m_hIcon);}//------------------------------OnButtonnClicked 部分-------------------------------------------------------------------------void CCalculatorDlg::OnBnClickedOk(){Caldata.CLEAR();UpdateDisplay();}void CCalculatorDlg::OnBnClickedCancel(){Caldata.MC();UpdateDisplay();}void CCalculatorDlg::OnBnClickedCancel2() {Caldata.MR();UpdateDisplay();}void CCalculatorDlg::OnBnClickedOk4() {Caldata.KEYIN(1);UpdateDisplay();}void CCalculatorDlg::OnBnClickedOk6() {Caldata.KEYIN(4);UpdateDisplay();}void CCalculatorDlg::OnBnClickedOk2() {Caldata.MM();UpdateDisplay();}void CCalculatorDlg::OnBnClickedCancel3() {Caldata.MA();UpdateDisplay();}void CCalculatorDlg::OnBnClickedOk3() {Caldata.PN();UpdateDisplay();}void CCalculatorDlg::OnBnClickedCancel4() {Caldata.ADD();UpdateDisplay();}void CCalculatorDlg::OnBnClickedCancel6() {Caldata.KEYIN(2);UpdateDisplay();}void CCalculatorDlg::OnBnClickedCancel5() {Caldata.KEYIN(3);UpdateDisplay();}void CCalculatorDlg::OnBnClickedCancel8() {Caldata.KEYIN(6);UpdateDisplay();}void CCalculatorDlg::OnBnClickedCancel9() {Caldata.KEYIN(5);UpdateDisplay();}void CCalculatorDlg::OnBnClickedCancel7() {Caldata.MINUS();UpdateDisplay();}void CCalculatorDlg::OnBnClickedOk5(){Caldata.Mode_Error=Caldata.SQRT(); UpdateDisplay();}void CCalculatorDlg::OnBnClickedOk7(){Caldata.SQR();UpdateDisplay();}void CCalculatorDlg::OnBnClickedCancel10() {Caldata.BY();UpdateDisplay();}void CCalculatorDlg::OnBnClickedOk8(){Caldata.KEYIN(7);UpdateDisplay();}void CCalculatorDlg::OnBnClickedCancel12() {Caldata.KEYIN(8);UpdateDisplay();}void CCalculatorDlg::OnBnClickedCancel11() {Caldata.KEYIN(9);UpdateDisplay();}void CCalculatorDlg::OnBnClickedOk9(){Caldata.Mode_Error=Caldata.REC(); UpdateDisplay();}void CCalculatorDlg::OnBnClickedCancel13() {Caldata.DIV();UpdateDisplay();}void CCalculatorDlg::OnBnClickedOk10() {Caldata.Dot();UpdateDisplay();}void CCalculatorDlg::OnBnClickedCancel15() {Caldata.KEYIN(0);UpdateDisplay();}void CCalculatorDlg::OnBnClickedCancel14() {Caldata.Mode_Error=Caldata.EQUAL();UpdateDisplay();}//------------------------------------------Display部分-----------------------------------------------------------------void CCalculatorDlg::UpdateDisplay(){if(!Caldata.Mode_Error){if(!(Caldata.Mode_Dot)){Cal_display.Format(_T("%lf"),Caldata.Data_Display);for(int i=Cal_display.GetLength()-1;i>1;i--) //去掉尾部多余的0，这个方法可共用，可以写成STATIC{if(Cal_display.GetAt(i)=='.')break;if(Cal_display.GetAt(i)=='0')Cal_display.Delete(i);else break;}}else {if(Caldata.Data_Display!=0){int j=0;Cal_display.Format(_T("%lf"),Caldata.Data_Display);for(int i=Cal_display.GetLength()-1;i>1;i--){if(Cal_display.GetAt(i)=='.')break;if(Cal_display.GetAt(i)=='0')Cal_display.Delete(i);else break;}for(int i=Cal_display.GetLength()-1;i>1;i--){ if(Cal_display.GetAt(i)=='.') break;j++;}if(j<=Caldata.Digi_Dot)for(int i=0;i<Caldata.Digi_Dot-j;i++) //小数输入，尾部补0Cal_display.Append(_T("0")); }else{Cal_display.Format(_T("0."));for(int i=0;i<Caldata.Digi_Dot;i++){Cal_display.Append(_T("0"));}}}}else Cal_display.Format(_T("ERROR"));UpdateData(false);}void CCalculatorDlg::ResetDisplay(){}//--------------------------------CALDATA 部分-----------------------------------------------------------Cal_Data::Cal_Data(){Data_Display=0;Data_Remember=0;Data_Last=0;Mode_Remenber=false;Mode_Input=false;Mode_Dot=false;Mode_Error=false;Digi_Dot=0;calaction=Cal_Action::Action_Null;}void Cal_Data::CLEAR(){Data_Display=0;Data_Last=0;Mode_Input=false;Mode_Error=false;Mode_Dot=false;calaction=Cal_Action::Action_Null;}void Cal_Data::MA(){Data_Remember=Data_Remember+Data_Display; }void Cal_Data::MM(){Data_Remember=Data_Remember-Data_Display; }void Cal_Data::MR(){Data_Display=Data_Remember;Mode_Input=false;}void Cal_Data::MC(){Data_Remember=0;Mode_Remenber=false;}void Cal_Data::ADD(){Data_Last=Data_Display;Mode_Dot=Mode_Input=false; calaction=Cal_Action::Action_Add;}void Cal_Data::MINUS(){Data_Last=Data_Display;Mode_Dot=Mode_Input=false;calaction=Cal_Action::Action_Minus;}void Cal_Data::BY(){Data_Last=Data_Display;Mode_Dot=Mode_Input=false;calaction=Cal_Action::Action_By;}void Cal_Data::DIV(){Data_Last=Data_Display;Mode_Dot=Mode_Input=false;calaction=Cal_Action::Action_Divide;}bool Cal_Data::EQUAL(){double TMP;Digi_Dot=0;Mode_Dot=false;switch(calaction){case Cal_Action::Action_Add : Data_Display+=Data_Last; Mode_Dot=Mode_Input=false;break;case Cal_Action::Action_Minus: Data_Display=Data_Last-Data_Display;Mode_Dot=Mode_Input=false;break;case Cal_Action::Action_By: Data_Display*=Data_Last;Mode_Dot=Mode_Input=false;break;case Cal_Action::Action_Divide: if(Data_Display==0)return true;else Data_Display=Data_Last/Data_Display;Mode_Dot=Mode_Input=false;break;case Cal_Action::Action_Null: Mode_Dot=Mode_Input=false;break;}calaction=Cal_Action::Action_Null;return false;}void Cal_Data::SQR(){Data_Display*=Data_Display;Mode_Dot=Mode_Input=false;}bool Cal_Data::SQRT(){Mode_Dot=Mode_Input=false;if(Data_Display<0)return true;Data_Display=sqrt(Data_Display);return false;}bool Cal_Data::REC(){Mode_Dot=Mode_Input=false;if(Data_Display==0)return true;else Data_Display=1/Data_Display;return false;}void Cal_Data::PN(){if(Data_Display!=0) Data_Display=-Data_Display;}void Cal_Data::Dot(){if(!Mode_Dot) { Mode_Dot=true;Digi_Dot=0;}}void Cal_Data::KEYIN(int value){ if(Data_Display>=100000000000000) //double型的数大于100000000000000后精度不高，所以限定为15位return;if(!Mode_Input){ Mode_Input=true;Data_Display=0;}if(!Mode_Dot){Data_Display*=10.0;Data_Display=Data_Display>=0? Data_Display+(double)value: Data_Display-(double)value;}else{if(Digi_Dot>=6) //小数点后面最多输入到第6位，否者会出错（double的精度不高）return;Digi_Dot++;double TMP=value;for(int i=0;i<Digi_Dot;i++){TMP=TMP/10.0;}Data_Display=Data_Display>=0? Data_Display+TMP:Data_Display-TMP;。

计算器源代码

计算器源代码
#define NUM5 0x4c35 /* 小键盘区上数字键5 */
#define NUM6 0x4d36 /* 小键盘区上数字键6 */
#define NUM7 0x4737 /* 小键盘区上数字键7 */
#define NUM8 0x4838 /* 小键盘区上数字键8 */
void CommandButton_KeyboardUp(int i); /*定义松开编号为i的按键所进行的操作，如按钮的状态*/
void InitApp(); /*初始化程序*/
void Showme(); /*显示计算器界面*/
void Load(); /*初始化默认值*/
case F9: key=11;break;
case NUMPNT:case KEYPNT: key=12;break;
case NUMADD: key=13;break;
#include "graphics.h" /* 图形函数库 */
#include "bios.h" /* 基本输入输出系统函数库*/
#include "dos.h" /* dos函数库 */
#define NUM0 0x5230 /* 小键盘区上数字键0 */
#define KEY5 0x635 /* 主键盘区上数字键5 */
#define KEY6 0x736 /* 主键盘区上数字键6 */
#define KEY7 0x837 /* 主键盘区上数字键7 */
#define KEY8 0x938 /* 主键盘区上数字键8 */
int top,pointflag,digitkeyhit; /*top:保存缓冲区中的当前位数，pointflag:小数点标记，digitkeyhit:数字键按键标记*/

C语言简单计算器程序源代码

C语言简单计算器程序源代码

C语言简单计算器程序源代码以下是一个简单的C语言计算器程序的源代码：```c#include <stdio.h>int maichar operator;double num1, num2;printf("请输入运算符：");scanf("%c", &operator);printf("请输入两个数字：");scanf("%lf %lf", &num1, &num2);switch (operator)case '+':printf("%.2lf + %.2lf = %.2lf", num1, num2, num1 + num2); break;case '-':printf("%.2lf - %.2lf = %.2lf", num1, num2, num1 - num2); break;case '*':printf("%.2lf * %.2lf = %.2lf", num1, num2, num1 * num2);break;case '/':if (num2 != 0)printf("%.2lf / %.2lf = %.2lf", num1, num2, num1 / num2);elseprintf("除数不能为0");break;default:printf("无效的运算符");}return 0;```这个程序首先提示用户输入一个运算符，然后再提示输入两个数字。

接下来，程序会根据输入的运算符执行相应的计算，并打印结果。

在计算除法时，程序会检查除数是否为0，如果为0，则打印错误信息。

请注意，这只是一个非常简单的计算器程序，没有考虑很多错误处理情况。

android计算器源代码

android计算器源代码

界面设计<LinearLayoutxmlns:android="/apk/res/android"xmlns:tools="/tools"android:layout_width="fill_parent"android:layout_height="fill_parent"android:orientation="vertical"tools:context=".MainActivity"><LinearLayoutandroid:layout_width="fill_parent"android:layout_height="wrap_content"android:layout_weight="2"android:orientation="horizontal"><EditTextandroid:id="@+id/led"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_margin="3dip"android:background="#ccc"android:gravity="top|right"android:text=""android:textColor="#000"android:textSize="12pt"/></LinearLayout><LinearLayoutandroid:layout_width="fill_parent"android:layout_height="wrap_content"android:layout_weight="1"android:orientation="horizontal"><Buttonandroid:id="@+id/time"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_weight="1"android:text="time"android:textSize="10pt"/><Buttonandroid:id="@+id/pow"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_weight="1"android:text="pow"android:textSize="10pt"/><Buttonandroid:id="@+id/sqrt"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_weight="1"android:text="sqrt"android:textSize="10pt"/><Buttonandroid:id="@+id/clear"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_weight="1"android:text="clear"android:textSize="10pt"/></LinearLayout><LinearLayoutandroid:layout_width="fill_parent"android:layout_height="wrap_content"android:layout_weight="1"android:orientation="horizontal"><Buttonandroid:id="@+id/seven"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_weight="1"android:text="7"android:textSize="12pt"/><Buttonandroid:id="@+id/eight"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_weight="1"android:text="8"android:textSize="12pt"/><Buttonandroid:id="@+id/nine"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_weight="1"android:text="9"android:textSize="12pt"/><Buttonandroid:id="@+id/division"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_weight="1"android:text="÷"android:textSize="12pt"/></LinearLayout><LinearLayoutandroid:layout_width="fill_parent"android:layout_height="wrap_content"android:layout_weight="1"android:orientation="horizontal"><Buttonandroid:id="@+id/four"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_weight="1"android:text="4"android:textSize="12pt"/><Buttonandroid:id="@+id/five"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_weight="1"android:text="5"android:textSize="12pt"/><Buttonandroid:id="@+id/six"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_weight="1"android:text="6"android:textSize="12pt"/><Buttonandroid:id="@+id/mult"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_weight="1"android:text="*"android:textSize="12pt"/></LinearLayout><LinearLayoutandroid:layout_width="fill_parent"android:layout_height="wrap_content"android:layout_weight="1"android:orientation="horizontal"><Buttonandroid:id="@+id/one"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_weight="1"android:text="1"android:textSize="12pt"/><Buttonandroid:id="@+id/two"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_weight="1"android:text="2"android:textSize="12pt"/><Buttonandroid:id="@+id/three"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_weight="1"android:text="3"android:textSize="12pt"/><Buttonandroid:id="@+id/sub"android:layout_width="fill_parent"android:layout_height="fill_parent"android:layout_weight="1"android:text="-"android:textSize="12pt"/></LinearLayout>Java源代码package youtclss;import java.util.Date;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener; import android.widget.Button;import android.widget.EditText;public class MainActivity extends Activity { private Button one;private Button two;private Button three;private Button four;private Button five;private Button six;private Button seven;private Button eight;private Button nine;private Button zero;private Button dot;private Button add;private Button sub;private Button mult;private Button division;private Button amount;private Button clear;private Button time;private Button sqrt;private Button pow;private EditText led;String num1 = "";String num2 = "";double num3 = 0;String rezult = "";String sign = null;int mark = 0;boolean flag = true;boolean dotmark = true;protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);setContentView(yout.main);zero = (Button) findViewById(R.id.zero);one = (Button) findViewById(R.id.one);two = (Button) findViewById(R.id.two);three = (Button) findViewById(R.id.three);four = (Button) findViewById(R.id.four);five = (Button) findViewById(R.id.five);six = (Button) findViewById(R.id.six);seven = (Button) findViewById(R.id.seven);eight = (Button) findViewById(R.id.eight);nine = (Button) findViewById(R.id.nine);dot = (Button) findViewById(R.id.dot);add = (Button) findViewById(R.id.add);sub = (Button) findViewById(R.id.sub);mult = (Button) findViewById(R.id.mult);division = (Button) findViewById(R.id.division); clear = (Button) findViewById(R.id.clear); amount = (Button) findViewById(R.id.amount); time = (Button) findViewById(R.id.time);pow = (Button) findViewById(R.id.pow);sqrt = (Button) findViewById(R.id.sqrt);led = (EditText) findViewById(R.id.led);zero.setOnClickListener(new OnClickListener() { public void onClick(View v) {if (mark == 0) {num1 = num1 + "0";led.setText(num1);} else if (mark == 1) {num2 = num2 + "0";led.setText(num1 + sign + num2);} else {num1 = String.valueOf(num3);num2 = num2 + "0";led.setText(num1 + sign + num2);}}});one.setOnClickListener(new OnClickListener() { public void onClick(View v) {if (mark == 0) {num1 = num1 + "1";led.setText(num1);} else if (mark == 1) {num2 = num2 + "1";led.setText(num1 + sign + num2);} else {num1 = String.valueOf(num3);num2 = num2 + "1";led.setText(num1 + sign + num2);}}});two.setOnClickListener(new OnClickListener() { public void onClick(View v) {if (mark == 0) {num1 = num1 + "2";led.setText(num1);} else if (mark == 1) {num2 = num2 + "2";led.setText(num1 + sign + num2);} else {num1 = String.valueOf(num3);num2 = num2 + "2";led.setText(num1 + sign + num2);}}});three.setOnClickListener(new OnClickListener() { public void onClick(View v) {if (mark == 0) {num1 = num1 + "3";led.setText(num1);} else if (mark == 1) {num2 = num2 + "3";led.setText(num1 + sign + num2);} else {num1 = String.valueOf(num3);num2 = num2 + "3";led.setText(num1 + sign + num2);}}});four.setOnClickListener(new OnClickListener() { public void onClick(View v) {if (mark == 0) {num1 = num1 + "4";led.setText(num1);} else if (mark == 1) {num2 = num2 + "4";led.setText(num1 + sign + num2);} else {num1 = String.valueOf(num3);num2 = num2 + "4";led.setText(num1 + sign + num2);}}});five.setOnClickListener(new OnClickListener() { public void onClick(View v) {if (mark == 0) {num1 = num1 + "5";led.setText(num1);} else if (mark == 1) {num2 = num2 + "5";led.setText(num1 + sign + num2);} else {num1 = String.valueOf(num3);num2 = num2 + "5";led.setText(num1 + sign + num2);}}});six.setOnClickListener(new OnClickListener() { public void onClick(View v) {if (mark == 0) {num1 = num1 + "6";led.setText(num1);} else if (mark == 1) {num2 = num2 + "6";led.setText(num1 + sign + num2);} else {num1 = String.valueOf(num3);num2 = num2 + "6";led.setText(num1 + sign + num2);}}});seven.setOnClickListener(new OnClickListener() { public void onClick(View v) {if (mark == 0) {num1 = num1 + "7";led.setText(num1);} else if (mark == 1) {num2 = num2 + "7";led.setText(num1 + sign + num2);} else {num1 = String.valueOf(num3);num2 = num2 + "7";led.setText(num1 + sign + num2);}}});eight.setOnClickListener(new OnClickListener() { public void onClick(View v) {if (mark == 0) {num1 = num1 + "8";led.setText(num1);} else if (mark == 1) {num2 = num2 + "8";led.setText(num1 + sign + num2);} else {num1 = String.valueOf(num3);num2 = num2 + "8";led.setText(num1 + sign + num2);}}});nine.setOnClickListener(new OnClickListener() { public void onClick(View v) {if (mark == 0) {num1 = num1 + "9";led.setText(num1);} else if (mark == 1) {num2 = num2 + "9";led.setText(num1 + sign + num2);} else {num1 = String.valueOf(num3);num2 = num2 + "9";led.setText(num1 + sign + num2);}}});add.setOnClickListener(new OnClickListener() { public void onClick(View v) {if (flag) {sign = "+";mark++;flag = false;dotmark = true;}}});sub.setOnClickListener(new OnClickListener() { public void onClick(View v) {if (flag) {sign = "-";mark++;flag = false;dotmark = true;}}});mult.setOnClickListener(new OnClickListener() { public void onClick(View v) {if (flag) {sign = "*";mark++;flag = false;dotmark = true;}}});division.setOnClickListener(new OnClickListener() {public void onClick(View v) {if (flag) {sign = "÷";mark++;flag = false;dotmark = true;}}});pow.setOnClickListener(new OnClickListener() {public void onClick(View v) {if (flag) {sign = "^";mark++;flag = false;dotmark = true;}}});dot.setOnClickListener(new OnClickListener() {public void onClick(View v) {if (dotmark) {if (mark == 0) {num1 = num1 + ".";led.setText(num1);} else if (mark == 1) {num2 = num2 + ".";led.setText(num1 + sign + num2);} else {num1 = String.valueOf(num3);num2 = num2 + ".";led.setText(num1 + sign + num2);}dotmark = false;}}});amount.setOnClickListener(new OnClickListener() { // 等于时发生的运算public void onClick(View v) {flag = true;dotmark = true;if (sign.equals("+")) {double x = Double.parseDouble(num1);double y = Double.parseDouble(num2);num3 = x + y;rezult = String.valueOf(num3);led.setText(num1 + sign + num2 + "=" + rezult);num2 = "";} else if (sign.equals("-")) {double x = Double.parseDouble(num1);double y = Double.parseDouble(num2);num3 = x - y;rezult = String.valueOf(num3);led.setText(num1 + sign + num2 + "=" + rezult);num2 = "";} else if (sign.equals("*")) {double x = Double.parseDouble(num1);double y = Double.parseDouble(num2);num3 = x * y;rezult = String.valueOf(num3);led.setText(num1 + sign + num2 + "=" + rezult);num2 = "";} else if (sign.equals("÷")) {double x = Double.parseDouble(num1);double y = Double.parseDouble(num2);num3 = x / y;rezult = String.valueOf(num3);led.setText(num1 + sign + num2 +"=" + rezult);num2 = "";} else if (sign.equals("^")) {double x = Double.parseDouble(num1);double y = Double.parseDouble(num2);num3 = Math.pow(x, y);rezult = String.valueOf(num3);led.setText(num1 + sign + num2 + "=" + rezult);num2 = "";}}});clear.setOnClickListener(new OnClickListener() {public void onClick(View v) {num1 = "";num2 = "";num3 = 0;mark = 0;sign = "";led.setText("0");flag = true;dotmark = true;}});sqrt.setOnClickListener(new OnClickListener() {public void onClick(View v) {if (mark == 0 && !num1.equals("") &&num2.equals("")) {double parent =Double.parseDouble(num1);double root = Math.sqrt(parent);rezult = String.valueOf(root);led.setText(rezult);num1 = "";}}});time.setOnClickListener(new OnClickListener() { public void onClick(View v) {Date date = new Date();led.setText(date.toLocaleString());}});}。

android计算器源码

android计算器源码

这是我本人做的Android 简单计算器源代码。

可以实现普通四则运算2,10,16进制转换。

常见异常处理，可以实现activity屏幕跳转。

算法用逆波兰实现。

本项目所有代码不涉及任何知识产权问题，完全由自己学习android时候写的，所以各位可以放心下载。

AndroidManifest.xml代码<?xml version="1.0"encoding="utf-8"?><manifest xmlns:android="/apk/res/android"package="my.calu"android:versionCode="1"android:versionName="1.0"><application android:icon="@drawable/meinv"android:label="@string/app_name"><activity android:name=".Main"android:label="@string/app_name"><intent-filter><action android:name="android.intent.action.MAIN"/><categoryandroid:name="UNCHER"/></intent-filter></activity></application><uses-sdk android:minSdkVersion="4"/></manifest>//layout 代码<?xml version="1.0"encoding="utf-8"?><AbsoluteLayoutandroid:id="@+id/background"android:layout_width="fill_parent"android:layout_height="fill_parent"xmlns:android="/apk/res/android"><Buttonandroid:id="@+id/binary_sign"android:layout_width="73px"android:layout_height="52px"android:text="10/2"android:layout_x="14dp"android:layout_y="148dp"/><Buttonandroid:id="@+id/sexadecimal_sign"android:layout_width="73px"android:layout_height="52px"android:text="10/16"android:layout_x="88dp"android:layout_y="148dp"/><Buttonandroid:id="@+id/add_sign"android:layout_width="73px"android:layout_height="52px"android:text="+"android:layout_x="240dp"android:layout_y="382dp"/><EditTextandroid:id="@+id/editview"android:layout_width="295px"android:layout_height="76px"android:text=""android:textSize="18sp"android:layout_x="8dp"android:layout_y="14dp"/><Buttonandroid:id="@+id/number0"android:layout_width="73px"android:layout_height="52px"android:text="0"android:layout_x="89dp"android:layout_y="382dp"/> <Buttonandroid:id="@+id/point_sign"android:layout_width="73px"android:layout_height="52px"android:text="."android:layout_x="10dp"android:layout_y="382dp"/> <Buttonandroid:id="@+id/sub_sign"android:layout_width="73px"android:layout_height="52px"android:text="-"android:layout_x="240dp"android:layout_y="322dp"/> <Buttonandroid:id="@+id/mult_sign"android:layout_width="73px"android:layout_height="52px"android:text="*"android:layout_x="240dp"android:layout_y="262dp"/> <Buttonandroid:id="@+id/dev_sign"android:layout_width="73px"android:layout_height="52px"android:text="÷"android:layout_x="240dp"android:layout_y="202dp"/> <Buttonandroid:id="@+id/number3"android:layout_width="73px"android:layout_height="52px"android:text="3"android:layout_x="170dp"android:layout_y="322dp"/> <Buttonandroid:id="@+id/number6"android:layout_width="73px"android:layout_height="52px"android:text="6"android:layout_x="170dp"android:layout_y="262dp"/> <Buttonandroid:id="@+id/equal_sign"android:layout_width="73px"android:layout_height="52px"android:text="="android:layout_x="167dp"android:layout_y="382dp"/> <Buttonandroid:id="@+id/number1"android:layout_width="73px"android:layout_height="52px"android:text="1"android:layout_x="10dp"android:layout_y="322dp"/> <Buttonandroid:id="@+id/number5"android:layout_width="73px"android:layout_height="52px"android:text="5"android:layout_x="90dp"android:layout_y="262dp"/> <Buttonandroid:id="@+id/number4"android:layout_width="73px"android:layout_height="52px"android:text="4"android:layout_x="10dp"android:layout_y="262dp"/> <Buttonandroid:id="@+id/number9"android:layout_width="73px"android:layout_height="52px"android:text="9"android:layout_x="170dp"android:layout_y="202dp"/><Buttonandroid:id="@+id/number8"android:layout_width="73px"android:layout_height="52px"android:text="8"android:layout_x="90dp"android:layout_y="202dp"/><Buttonandroid:id="@+id/number7"android:layout_width="73px"android:layout_height="52px"android:text="7"android:layout_x="10dp"android:layout_y="202dp"/><Buttonandroid:id="@+id/number2"android:layout_width="73px"android:layout_height="52px"android:text="2"android:layout_x="90dp"android:layout_y="322dp"/><Buttonandroid:id="@+id/clear_sign"android:layout_width="138px"android:layout_height="wrap_content"android:text="C"android:layout_x="174dp"android:layout_y="148dp"/></AbsoluteLayout>主代码package my.calu;import java.util.ArrayList;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.EditText;import android.widget.Toast;//package expression;import java.util.ArrayList;import java.util.Stack;import java.util.regex.Matcher;import java.util.regex.Pattern;public class Main extends Activity implements OnClickListener {private static final char Str = 0;private Buttonnumber0,number1,number2,number3,number4,number5,number6,number7,numbe r8,number9;private Buttonbinary_sign,sexadecimal_sign,clear_sign,point_sign,add_sign,sub_sign, mult_sign,dev_sign,equal_sign;private EditText edittext;private String buffer="";private boolean first_is_number=false ,after_equal=false,flage_10zhijing=true,flage_16zhijing=true;//初始化事件public void init() {this.edittext=(EditText) findViewById(R.id.editview);this.edittext.setOnClickListener(this);this.number0=(Button) findViewById(R.id.number0);this.number0.setOnClickListener(this);this.number1=(Button) findViewById(R.id.number1);this.number1.setOnClickListener(this);this.number2=(Button) findViewById(R.id.number2);this.number2.setOnClickListener(this);this.number3=(Button) findViewById(R.id.number2);this.number0.setOnClickListener(this);this.number3=(Button) findViewById(R.id.number3);this.number3.setOnClickListener(this);this.number4=(Button) findViewById(R.id.number4);this.number4.setOnClickListener(this);this.number5=(Button) findViewById(R.id.number5);this.number5.setOnClickListener(this);this.number6=(Button) findViewById(R.id.number6);this.number6.setOnClickListener(this);this.number7=(Button) findViewById(R.id.number7);this.number7.setOnClickListener(this);this.number8=(Button) findViewById(R.id.number8);this.number8.setOnClickListener(this);this.number9=(Button) findViewById(R.id.number9);this.number9.setOnClickListener(this);this.point_sign=(Button) findViewById(R.id.point_sign);this.point_sign.setOnClickListener(this);this.equal_sign=(Button) findViewById(R.id.equal_sign);this.equal_sign.setOnClickListener(this);this.add_sign=(Button) findViewById(R.id.add_sign);this.add_sign.setOnClickListener(this);this.sub_sign=(Button) findViewById(R.id.sub_sign);this.sub_sign.setOnClickListener(this);this.mult_sign=(Button) findViewById(R.id.mult_sign);this.mult_sign.setOnClickListener(this);this.dev_sign=(Button) findViewById(R.id.dev_sign);this.dev_sign.setOnClickListener(this);this.clear_sign=(Button) findViewById(R.id.clear_sign);this.clear_sign.setOnClickListener(this);this.binary_sign=(Button) findViewById(R.id.binary_sign);this.binary_sign.setOnClickListener(this);this.sexadecimal_sign=(Button)findViewById(R.id.sexadecimal_sign);this.sexadecimal_sign.setOnClickListener(this);}//判断字符串是否为全为0-9的整形数public boolean is10Numeric(String str){Pattern pattern = pile("[0-9]*");Matcher isNum = pattern.matcher(str);if( !isNum.matches() ){return false;}return true;}//判断字符串是否为全为0-1的整形数public boolean is2Numeric(String str){Pattern pattern = pile("[0-1]*");Matcher isNum = pattern.matcher(str);if( !isNum.matches() ){return false;}return true;}//判断字符串是否为全为0-f的整形数public boolean is16Numeric(String str){Pattern pattern = pile("[0-f]*");Matcher isNum = pattern.matcher(str);if( !isNum.matches() ){return false;}return true;}//判断最后一位和第一位是否为数字public boolean isnumber ( String s) {int i=s.length();char c=s.charAt(i-1);char k=s.charAt(0);// System.out.println("---firstnumber--"+k);// System.out.println("---70c=charAt--"+c);if(s.equals(null)) {return false;}if((c >= '0' && c <= '9')&& (k >='0' && k <= '9') ){return true;}elsereturn false;}//判断是否有运算符public boolean have_signal(String s){after_equal=false;boolean have=s.contains("+");if(s.contains("+")||s.contains("-") || s.contains("*") || s.contains("/"))return true;elsereturn false;}//-------堆栈算法---------public void deal_equal (String s){// System.out.println("Hello World!");//中缀 => 后缀表达式SSSssss// String s = "8-3*5"; //中缀String S = ""; //后缀char[] Operators = new char[s.length()];int Top = -1;for (int i = 0; i < s.length(); i++){char C = s.charAt(i);// System.out.print(C);switch(C){case' ' :b reak;case'+' : //操作符case'-' :while (Top >= 0) //栈不为空时{char c = Operators[Top--]; //pop Operatorif (c == '('){Operators[++Top] = c; //push Operatorbreak;}else{S = S + c;}}O perators[++Top] = C; //push OperatorS += " ";break;case'*' : //操作符case'/' :w hile (Top >= 0) //栈不为空时{char c = Operators[Top--]; //pop Operatorif (c == '('){Operators[++Top] = c; //push Operatorbreak;}else{if (c == '+' || c == '-'){Operators[++Top] = c; //push Operatorbreak;}else{S = S + c;}}}O perators[++Top] = C; //push OperatorS += " ";b reak;case'(' : //操作符Operators[++Top] = C;S += " ";break;case')' : //操作符while (Top >= 0) //栈不为空时{char c = Operators[Top--]; //pop Operatorif (c == '('){break;}else{S = S + c;}}S += " ";break;default : //操作数S = S + C;break;}}while (Top >= 0){S = S + Operators[Top--]; //pop Operator}// System.out.print(Operators);// System.out.println(S); //后缀//后缀表达式计算double[] Operands = new double[S.length()];// System.out.println(S.length());double x, y, v;Top = - 1;String Operand = "";for (int i = 0; i < S.length(); i++){char c = S.charAt(i);if ((c >= '0' && c <= '9') || c == '.'){Operand += c;// System.out.print(Operand+" ");}if ((c == ' ' && Operand != "") || i == S.length()) {Operands[++Top] = ng.Double.parseDouble(Operand) ; //push OperandsOperand = "";}if (c == '+' || c == '-' || c == '*' || c == '/'){if ((Operand != "")){Operands[++Top] = ng.Double.parseDouble(Operand) ;//push Operands// System.out.println(Operators);Operand = "";}y = Operands[Top--]; //pop 双目运算符的第二操作数 (后进先出)注意操作数顺序对除法的影响x = Operands[Top--]; //pop 双目运算符的第一操作数switch (c){case'+' :v = x + y;break;case'-' :v = x - y;break;case'*' :v = x * y;break;case'/' :v = x / y; // 第一操作数 / 第二操作数注意操作数顺序对除法的影响break;default :v = 0;break;}Operands[++Top] = v; //push 中间结果再次入栈}}v = Operands[Top--]; //pop 最终结果// System.out.println("-------result-------"+v);String result=v+"";this.edittext.setText(result);}/** Called when the activity is first created. *///------------------函数入口--wangwei-------------//@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(yout.main);this.init();//跳转// Intent intent=new Intent();//// Intent intent=TwoActivity.this.getlntent(); // Bundle bundle=intent.getExtras();// String name=bundle.getString(buffer);//}//触发事件后的动作// @Overridepublic void onClick(View v) {try {// TODO Auto-generated method stubif(v.getId()==this.number0.getId()) {buffer=buffer+0;this.edittext.setText(buffer);// first_is_number=true;}else if(v.getId()==this.number1.getId()) { buffer=buffer+1;this.edittext.setText(buffer);// first_is_number=true;}else if(v.getId()==this.number2.getId()) { buffer=buffer+2;this.edittext.setText(buffer);}else if(v.getId()==this.number3.getId()) { buffer=buffer+3;this.edittext.setText(buffer);// first_is_number=true;}else if(v.getId()==this.number4.getId()) { buffer=buffer+4;this.edittext.setText(buffer);// first_is_number=true;}else if(v.getId()==this.number5.getId()) { buffer=buffer+5;this.edittext.setText(buffer);}else if(v.getId()==this.number6.getId()) {buffer=buffer+6;this.edittext.setText(buffer);// first_is_number=true;}else if(v.getId()==this.number7.getId()) {buffer=buffer+7;this.edittext.setText(buffer);// first_is_number=true;}else if(v.getId()==this.number8.getId()) {buffer=buffer+8;this.edittext.setText(buffer);first_is_number=true;}else if(v.getId()==this.number9.getId()) {buffer=buffer+9;this.edittext.setText(buffer);// first_is_number=true;//---------------2进制的转换-----------}else if(v.getId()==this.binary_sign.getId()) { boolean is10=is10Numeric(buffer);boolean is2=is2Numeric(buffer);if(is10&&(flage_10zhijing==true)){int num=Integer.parseInt(buffer);flage_10zhijing=false;buffer=Integer.toBinaryString(num)+"" ;System.out.println("is10"+flage_10zhijing);}else if (is2&&(flage_10zhijing==false)){flage_10zhijing=true;buffer=Integer.valueOf(buffer,2).toString()+"" ;}else {//System.out.println(" 不是10进制也不是二进制");//buffer="0000000000";}this.edittext.setText(buffer);//----------------16进制的转换--------------}else if(v.getId()==this.sexadecimal_sign.getId()) { boolean is16=false,is10=false;is16=is16Numeric(buffer);is10=is10Numeric(buffer);System.out.println("is16 --- "+is16);System.out.println("flage_16zhijing"+flage_16zhijing);if(is10&&flage_16zhijing){int num=Integer.parseInt(buffer);flage_16zhijing=false;buffer=Integer.toHexString(num) +"" ;System.out.println("jinruis10 "+flage_16zhijing);}else if ((is16==true)&&(flage_16zhijing==false)){System.out.println("jinruis16 "+flage_16zhijing);flage_16zhijing=true;buffer=Integer.valueOf(buffer,16).toString() +"" ;//buffer="0000000000";}else {//System.out.println(" 不是16进制也不是1 0进制");//buffer="0000000000";}this.edittext.setText(buffer);//-------------四则运算-------------}else if(v.getId()==this.point_sign.getId()) {boolean isnumber;isnumber= isnumber ( buffer);if(isnumber)buffer=buffer+".";this.edittext.setText(buffer);}else if(v.getId()==this.sub_sign.getId()) {boolean isnumber;isnumber= isnumber ( buffer);if(isnumber)buffer=buffer+"-";this.edittext.setText(buffer);}else if(v.getId()==this.mult_sign.getId()) {boolean isnumber;isnumber= isnumber ( buffer);if(isnumber)buffer=buffer+"*";this.edittext.setText(buffer);}else if(v.getId()==this.dev_sign.getId()) {boolean isnumber;isnumber= isnumber ( buffer);if(isnumber)buffer=buffer+"/";this.edittext.setText(buffer);}else if(v.getId()==this.add_sign.getId()) {boolean isnumber;isnumber= isnumber ( buffer);if(isnumber){buffer=buffer+"+";this.edittext.setText(buffer);}else {//buffer="000000000000";this.edittext.setText(buffer);}//-------------------清除-------------------}else if(v.getId()==this.clear_sign.getId()) {// if(after_equal) {// int len=buffer.length();// if(len >=1) {// buffer= (String )buffer.subSequence(0, len-1); // }//// } else {// buffer="";// }buffer="";this.edittext.setText(buffer);//--------------计算结果------------------------}else if(v.getId()==this.equal_sign.getId()) {boolean isnumber;if(buffer.equals(null)) {buffer=" ";this.edittext.setText(buffer);}else {isnumber= isnumber ( buffer);boolean have_signal=have_signal(buffer);if(isnumber&&have_signal){after_equal=true;deal_equal(buffer);}}}} catch (Exception e) {// TODO: handle exception}// System.out.println("-----327------"+buffer);}}。

android计算器简单实现代码

android计算器简单实现代码

android计算器简单实现代码本⽂实例为⼤家分享了android计算器的具体实现代码，供⼤家参考，具体内容如下java代码：package com.itheima74.simplecalculator4;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.widget.TextView;import android.widget.Toast;import com.iflytek.cloud.InitListener;import com.iflytek.cloud.SpeechConstant;import com.iflytek.cloud.SpeechError;import com.iflytek.cloud.SpeechSynthesizer;import com.iflytek.cloud.SpeechUtility;import com.iflytek.cloud.SynthesizerListener;import com.iflytek.cloud.util.ResourceUtil;import java.util.ArrayList;/*** 简易计算器(第三版)* 功能介绍:* 1.⽀持连续计算* 2.⽀持离线语⾳* 3.科⼤讯飞在线(离线)语⾳合成SDK使⽤步骤:* a.下载SDK,注册APPID* b.拷贝libs⽬录下Msc.jar⾄⼯程libs⽬录,右键:add as library* c.创建assets⽬录,拷贝tts⽂件夹下3个离线发⾳⼈资源* d.创建jniLibs⽬录,拷贝armeabi⽂件夹,x86⽂件(视具体⼿机机型⽽定) * e.初始化SDK*/public class MainActivity extends AppCompatActivity implements View.OnClickListener {private TextView tv;// 显⽰控件private ArrayList<String> mList;// 存储⽤户输⼊集合private double mResult;// 计算结果,当除数为0时,⽆法计算结果,默认为初始值0private boolean mFlag = true;// 控制在线语⾳功能是否开启的变量,默认开启@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(yout.activity_main);initSDK();initView();initList();}/*** 2.初始化离线语⾳** @param flag 离线语⾳开启或关闭开关* @param msg 要朗读的⽂字*/private void initLocalHeCheng(boolean flag, String msg) {if (flag) {//1.创建SpeechSynthesizer对象,第⼆个参数:本地合成传InitListenerSpeechSynthesizer mTts = SpeechSynthesizer.createSynthesizer(this, new InitListener() {@Overridepublic void onInit(int code) {}});//2.合成参数设置//设置引擎类型为本地mTts.setParameter(SpeechConstant.ENGINE_TYPE, SpeechConstant.TYPE_LOCAL);//设置本地发⾳⼈mTts.setParameter(SpeechConstant.VOICE_NAME, "xiaoyan");//加载本地合成资源，resPath为本地合成资源路径mTts.setParameter(ResourceUtil.TTS_RES_PATH, getResourcePath());// 设置语速mTts.setParameter(SpeechConstant.SPEED, "60");// 设置⾳调mTts.setParameter(SpeechConstant.PITCH, "50");// 设置⾳量mTts.setParameter(SpeechConstant.VOLUME, "100");// 设置播放器⾳频流类型mTts.setParameter(SpeechConstant.STREAM_TYPE, "3");//设置合成⾳频保存位置（可⾃定义保存位置），保存在“./sdcard/iflytek.pcm”//保存在SD卡需要在AndroidManifest.xml添加写SD卡权限//如果不需要保存合成⾳频，注释该⾏代码//mTts.setParameter(SpeechConstant.TTS_AUDIO_PATH, "./sdcard/iflytek.pcm");//3.开始合成mTts.startSpeaking(msg, mSynListener);}}// 获取发⾳⼈资源路径private String getResourcePath() {StringBuffer tempBuffer = new StringBuffer();// 合成通⽤资源tempBuffer.append(ResourceUtil.generateResourcePath(this, ResourceUtil.RESOURCE_TYPE.assets, "tts/common.jet")); tempBuffer.append(";");// 发⾳⼈资源tempBuffer.append(ResourceUtil.generateResourcePath(this, ResourceUtil.RESOURCE_TYPE.assets, "tts/xiaoyan.jet")); return tempBuffer.toString();}/*** 1.初始化SDK*/private void initSDK() {SpeechUtility.createUtility(this, SpeechConstant.APPID + "=58ba4628");}// 创建⼀个选项菜单@Overridepublic boolean onCreateOptionsMenu(Menu menu) {getMenuInflater().inflate(R.menu.main, menu);return true;}// 处理选项菜单的点击事件@Overridepublic boolean onOptionsItemSelected(MenuItem item) {switch (item.getItemId()) {case R.id.exit:this.finish();break;case R.id.open_local_voice:mFlag = true;mFlag = false;break;}return super.onOptionsItemSelected(item);}/*** 2.在线语⾳合成,朗读** @param flag 控制⽅法的执⾏,true:执⾏,false:不执⾏* @param msg 需要朗读的⽂字*//*private void initYuYinHeCheng(boolean flag, String msg) {if (flag) {//1.创建SpeechSynthesizer对象, 第⼆个参数：本地合成时传InitListenerSpeechSynthesizer mTts = SpeechSynthesizer.createSynthesizer(this, null);//2.合成参数设置，详见《科⼤讯飞MSC API⼿册(Android)》SpeechSynthesizer 类mTts.setParameter(SpeechConstant.VOICE_NAME, mVoiceName);//设置发⾳⼈mTts.setParameter(SpeechConstant.SPEED, "50");//设置语速mTts.setParameter(SpeechConstant.VOLUME, "80");//设置⾳量，范围0~100mTts.setParameter(SpeechConstant.ENGINE_TYPE, SpeechConstant.TYPE_CLOUD); //设置云端//设置合成⾳频保存位置（可⾃定义保存位置），保存在“./sdcard/iflytek.pcm”//保存在SD卡需要在AndroidManifest.xml添加写SD卡权限//如果不需要保存合成⾳频，注释该⾏代码//mTts.setParameter(SpeechConstant.TTS_AUDIO_PATH, "./sdcard/iflytek.pcm");//3.开始合成mTts.startSpeaking(msg, mSynListener);}}*/// 合成监听器private SynthesizerListener mSynListener = new SynthesizerListener() {//开始播放@Overridepublic void onSpeakBegin() {}//缓冲进度回调//percent为缓冲进度0~100，beginPos为缓冲⾳频在⽂本中开始位置，endPos表⽰缓冲⾳频在⽂本中结束位置， //info为附加信息。

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这是本人自己用安卓编写的计算器，代码的优化可能有所问题，不过大家都在学习阶段，欢迎大家批评指正，还是上源码吧。

先来运行图package com.example.nanchen.exam_1_1;import android.content.DialogInterface;import android.support.v7.app.AlertDialog;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.TextView;public class MainActivity extends AppCompatActivity implements View.OnClickListener{private Button btn0;private Button btn1;private Button btn2;private Button btn3;private Button btn4;private Button btn5;private Button btn6;private Button btn7;private Button btn8;private Button btn9;private Button btnAdd;private Button btnSub;private Button btnMul;private Button btnDiv;private Button btnDec;private Button btnEqual;private Button btnClear;private Button btnBackSpace;private TextView textView_result;double num1 = 0,num2 = 0,result = 0;//定义存储结果和两个操作数boolean isCheckEqu = false;//检测是否点击了等于int op = 0;//定义运算符boolean hasDec = false;boolean hasOp = false;@Overrideprotected void onCreate Bundle savedInstanceStatesuper.onCreate savedInstanceState;setContentView yout.activity_main;textView_result = TextView findViewById R.id.result;btn0 = Button findViewById R.id.btn0;btn1 = Button findViewById R.id.btn1;btn2 = Button findViewById R.id.btn2;btn3 = Button findViewById R.id.btn3;btn4 = Button findViewById R.id.btn4;btn5 = Button findViewById R.id.btn5;btn6 = Button findViewById R.id.btn6;btn7 = Button findViewById R.id.btn7;btn8 = Button findViewById R.id.btn8;btn9 = Button findViewById R.id.btn9;btnAdd = Button findViewById R.id.btn10;btnSub = Button findViewById R.id.btn11;btnMul = Button findViewById R.id.btn12;btnDiv = Button findViewById R.id.btn13;btnDec = Button findViewById R.id.btn14;btnEqual = Button findViewById R.id.btn15;btnClear = Button findViewById R.id.clear;btnBackSpace = Button findViewById R.id.backSpace;btn0.setOnClickListener this;btn1.setOnClickListener this;btn2.setOnClickListener this;btn3.setOnClickListener this;btn4.setOnClickListener this;btn5.setOnClickListener this;btn6.setOnClickListener this;btn7.setOnClickListener this;btn8.setOnClickListener this;btn9.setOnClickListener this;btnAdd.setOnClickListener this;btnSub.setOnClickListener this;btnDec.setOnClickListener this;btnDiv.setOnClickListener this;btnEqual.setOnClickListener this;btnMul.setOnClickListener this;btnClear.setOnClickListener this;btnBackSpace.setOnClickListener this;@Overridepublic void onClick View vswitch v.getIdcase R.id.btn0:if isCheckEqutextView_result.setText null;isCheckEqu=false;String myString0 =textView_result.getText.toString;if myString0.equals"0"myString0 = "";myString0 += "0";textView_result.setText myString0;break;case R.id.btn1:if isCheckEqutextView_result.setText null;isCheckEqu=false;String myString1 =textView_result.getText.toString;if myString1.equals"0"myString1 = "";myString1 += "1";textView_result.setText myString1;break;case R.id.btn2:if isCheckEqutextView_result.setText null;isCheckEqu=false;String myString2 =textView_result.getText.toString;if myString2.equals"0"myString2 = "";myString2 += "2";textView_result.setText myString2;break;case R.id.btn3:if isCheckEqutextView_result.setText null;isCheckEqu=false;String myString3 =textView_result.getText.toString;if myString3.equals"0"myString3 = "";myString3 += "3";textView_result.setText myString3;break;case R.id.btn4:if isCheckEqutextView_result.setText null;isCheckEqu=false;String myString4 =textView_result.getText.toString;if myString4.equals"0"myString4 = "";myString4 += "4";textView_result.setText myString4;break;case R.id.btn5:if isCheckEqutextView_result.setText null;isCheckEqu=false;String myString5 =textView_result.getText.toString;if myString5.equals"0"myString5 = "";myString5 += "5";textView_result.setText myString5;break;case R.id.btn6:if isCheckEqutextView_result.setText null;isCheckEqu=false;String myString6 =textView_result.getText.toString;if myString6.equals"0"myString6 = "";myString6 += "6";textView_result.setText myString6;break;case R.id.btn7:if isCheckEqutextView_result.setText null;isCheckEqu=false;String myString7 =textView_result.getText.toString;if myString7.equals"0"myString7 = "";myString7 += "7";textView_result.setText myString7;break;case R.id.btn8:if isCheckEqutextView_result.setText null;isCheckEqu=false;String myString8 =textView_result.getText.toString;if myString8.equals"0"myString8 = "";myString8 += "8";textView_result.setText myString8;break;case R.id.btn9:if isCheckEqutextView_result.setText null;isCheckEqu=false;String myString9 =textView_result.getText.toString;if myString9.equals"0"myString9 = "";myString9 += "9";textView_result.setText myString9;break;case R.id.btn10:if hasOpdoEqual;//显示出来当前的答案String myStringAdd =textView_result.getText.toString;if myStringAdd.equals nullreturn;num1 = Double.valueOf myStringAdd;textView_result.setText null;// 这里被清除了op = 1;isCheckEqu = false;hasDec = false;hasOp = true;break;case R.id.btn11:if hasOpdoEqual;String myStringSub =textView_result.getText.toString;if myStringSub.equals nullreturn;num1 = Double.valueOf myStringSub;textView_result.setText null;op = 2;isCheckEqu = false;hasDec = false;hasOp = true;break;case R.id.btn12:if hasOpdoEqual;String myStringMul =textView_result.getText.toString;if myStringMul.equals nullreturn;num1 = Double.valueOf myStringMul;textView_result.setText null;op = 3;isCheckEqu = false;hasDec = false;hasOp = true;break;case R.id.btn13:if hasOpdoEqual;String myStringDiv =textView_result.getText.toString;if myStringDiv.equals nullreturn;num1 = Double.valueOf myStringDiv;textView_result.setText null;op = 4;hasDec = false;isCheckEqu = false;hasOp = true;break;case R.id.btn14:if isCheckEqutextView_result.setText null;isCheckEqu=false;if hasDec//如果已经有小数点了,则弹出一个对话框AlertDialog.Builder builder = new AlertDialog.Builder MainActivity.this;builder.setTitle"警告";builder.setMessage"输入错误，一个数字不能有两个小数点！";builder.setNegativeButton"取消", new DialogInterface.OnClickListener@Overridepublic void onClick DialogInterface dialog, int which;builder.show;return;hasDec = true;String myString14 =textView_result.getText.toString;myString14 += ".";textView_result.setText myString14;break;case R.id.btn15:doEqual;hasOp = false;break;case R.id.backSpace:String myString =textView_result.getText.toString;trytextView_result.setText myString.substring0,myString.length -1;catch Exception etextView_result.setText"0";break;case R.id.clear:textView_result.setText"0";break;default:break;/*** 按下等于*/private void doEqualStringmyStringEqu=textView_result.getText.toString;if myStringEqu.equals nullreturn;num2=Double.valueOf myStringEqu;textView_result.setText null;switch opcase 0:result=num2;break;case 1:result=num1+num2;break;case 2:result=num1-num2;break;case 3:result=num1*num2;break;case 4:result=num1/num2;break;default:result=0;break;textView_result.setText String.valueOf result;isCheckEqu=true;<?xml version="1.0" encoding="utf-8"?>LinearLayoutxmlns:android="/apk/res/android"xmlns:tools="/tools"android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="vertical"tools:context="com.example.nanchen.exam_1_1.MainActivity"<!--显示结果-->LinearLayoutandroid:layout_width="match_parent"android:layout_height="0dp"android:layout_weight="1"TextViewandroid:layout_width="match_parent"android:layout_height="match_parent"android:id="@+id/result"android:gravity="end"android:textSize="40sp"android:text="@string/zero"LinearLayoutLinearLayoutandroid:layout_width="match_parent"android:layout_height="0dp"android:orientation="horizontal"android:layout_weight="1"Buttonandroid:layout_width="0dp"android:layout_weight="1"android:layout_height="wrap_content"android:text="@string/clear"android:id="@+id/clear"android:textAllCaps="false"android:gravity="center"android:textSize="25sp"Buttonandroid:layout_width="0dp"android:layout_weight="1"android:layout_height="wrap_content"android:text="@string/backspace"android:id="@+id/backSpace"android:textAllCaps="false"android:gravity="center"android:textSize="25sp" LinearLayout<!--789/-->LinearLayoutandroid:layout_width="match_parent"android:layout_height="0dp"android:layout_weight="1"Buttonandroid:layout_width="0dp"android:text="@string/seven"android:id="@+id/btn7"android:textSize="30sp"android:gravity="center"android:layout_height="wrap_content"android:layout_weight="1"Buttonandroid:layout_width="0dp"android:text="@string/eight"android:id="@+id/btn8"android:textSize="30sp"android:gravity="center"android:layout_height="wrap_content"android:layout_weight="1"Buttonandroid:layout_width="0dp"android:text="@string/nine"android:id="@+id/btn9"android:textSize="30sp"android:gravity="center"android:layout_height="wrap_content"android:layout_weight="1"Buttonandroid:layout_width="0dp"android:text="@string/del"android:id="@+id/btn13"android:textSize="30sp"android:gravity="center"android:layout_height="wrap_content"android:layout_weight="1" LinearLayout<!--456*-->LinearLayoutandroid:layout_width="match_parent"android:layout_height="0dp"android:layout_weight="1"Buttonandroid:layout_width="0dp"android:text="@string/four"android:id="@+id/btn4"android:textSize="30sp"android:gravity="center"android:layout_height="wrap_content"android:layout_weight="1"Buttonandroid:layout_width="0dp"android:text="@string/five"android:id="@+id/btn5"android:textSize="30sp"android:gravity="center"android:layout_height="wrap_content"android:layout_weight="1"Buttonandroid:layout_width="0dp"android:text="@string/six"android:id="@+id/btn6"android:textSize="30sp"android:gravity="center"android:layout_height="wrap_content"android:layout_weight="1"Buttonandroid:layout_width="0dp"android:text="@string/mul"android:id="@+id/btn12"android:textSize="30sp"android:gravity="center"android:layout_height="wrap_content"android:layout_weight="1" LinearLayout<!--123- -->LinearLayoutandroid:layout_width="match_parent"android:layout_height="0dp"android:layout_weight="1"Buttonandroid:layout_width="0dp"android:text="@string/one"android:textSize="30sp"android:id="@+id/btn1"android:gravity="center"android:layout_height="wrap_content"android:layout_weight="1"Buttonandroid:layout_width="0dp"android:text="@string/two"android:id="@+id/btn2"android:textSize="30sp"android:gravity="center"android:layout_height="wrap_content"android:layout_weight="1"Buttonandroid:layout_width="0dp"android:text="@string/three"android:id="@+id/btn3"android:textSize="30sp"android:gravity="center"android:layout_height="wrap_content"android:layout_weight="1"Buttonandroid:layout_width="0dp"android:text="@string/sub"android:id="@+id/btn11"android:textSize="30sp"android:gravity="center"android:layout_height="wrap_content"android:layout_weight="1" LinearLayout<!--0.=+-->LinearLayoutandroid:layout_width="match_parent"android:layout_height="0dp"android:layout_weight="1"Buttonandroid:layout_width="0dp"android:text="@string/zero1"android:id="@+id/btn0"android:textSize="30sp"android:gravity="center"android:layout_height="wrap_content"android:layout_weight="1"Buttonandroid:layout_width="0dp"android:text="@string/dec"android:id="@+id/btn14"android:textSize="30sp"android:gravity="center"android:layout_height="wrap_content"android:layout_weight="1"Buttonandroid:layout_width="0dp"android:text="@string/equal"android:id="@+id/btn15"android:textSize="30sp"android:gravity="center"android:layout_height="wrap_content"android:layout_weight="1"Buttonandroid:layout_width="0dp"android:text="@string/add"android:id="@+id/btn10"android:textSize="30sp"android:gravity="center"android:layout_height="wrap_content"android:layout_weight="1"LinearLayoutLinearLayoutandroid:layout_weight="4"android:orientation="vertical"android:layout_width="match_parent"android:layout_height="0dp"TextViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:textSize="20sp"android:text="@string/string1"TextViewandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:text="@string/string2"android:textSize="20sp"LinearLayoutLinearLayout。

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