C语言代码案例解析

C语言代码案例解析第一题：打印输出一个5行3列的*结构图实训代码：using System;using System.Collections.Generic;using ponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;namespace WindowsApplication1{public partial class Form1 : Form{public Form1(){InitializeComponent();}private void button1_Click(object sender, EventArgs e) {for(int i=1;i<=5;i++){for(int j=1;j<=5-i;j++){label1.Text +=" ";}for (int k = 1; k <= 3; k++){label1.Text += "*";}label1.Text += "\n";}}}}实训截图：第二题：九九乘法表（P84.9）实训代码：using System;using System.Collections.Generic;using ponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;namespace九九乘法表{public partial class Form1 : Form{public Form1(){InitializeComponent();}private void button1_Click(object sender, EventArgs e) {string s;for (int a = 1; a <= 9; a++){for (int b = 1; b <= a; b++){s = b + "×" + a + "=" + a * b + ";" ;label1.Text += s+"";}label1.Text += "\n";}}}}实训截图：第三题：计算1！+2！+…+n!的值。

（P84.11）实训代码：using System;using System.Collections.Generic;using ponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;namespace WindowsApplication1{public partial class Form1 : Form{public Form1(){InitializeComponent();}private void button1_Click(object sender, EventArgs e) {int ji= 1;int he = 0;int n=int.Parse(textBox1.Text);for (int j = 1; j <= n; j++){ji = 1;for (int i = 1; i <= j; i++){ji=ji*i;}he = he + ji;{label2.Text = "1!+2!+...+n!的值为"+he; }}}}}实训截图：第四题：下拉列表改颜色实训代码：using System;using System.Collections.Generic;using ponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;namespace WindowsApplication4{public partial class Form1 : Form{public Form1(){InitializeComponent();}private void comboBox1_SelectedIndexChanged(object sender, EventArgs e) {if (comboBox1.SelectedIndex == 0){label1.ForeColor = Color.Red;}else if (comboBox1.SelectedIndex == 1){label1.ForeColor = Color.Yellow;}else if (comboBox1.SelectedIndex == 2){label1.ForeColor = Color.Blue;}else if (comboBox1.SelectedIndex == 3){label1.ForeColor = Color.Green;}}}}实训截图：第五题：书店销售实训代码：using System;using System.Collections.Generic;using ponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;namespace WindowsApplication1{public partial class Form1 : Form{public Form1(){InitializeComponent();}private void button1_Click(object sender, EventArgs e) {int shuliang= int.Parse(textBox1.Text);String a=textBox2.Text;double danjia = double.Parse(textBox3.Text);double yuanjia;double x;double z;yuanjia = shuliang * danjia;label9.Text ="$"+ yuanjia.ToString();x = 0.85 * yuanjia;label10.Text ="$"+ x.ToString();z = yuanjia - x;label11.Text = "$"+z.ToString();label12.Text = a+"";}private void button2_Click(object sender, EventArgs e) {textBox1.Text = "";textBox2.Text = "";textBox3.Text = "";label9.Text = "";label10.Text = "";label11.Text = "";}private void button3_Click(object sender, EventArgs e) {this.Close();}}}实训截图：第六题：选中复选框个数统计实训代码：using System;using System.Collections.Generic;using ponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;namespace WindowsApplication2{public partial class Form1 : Form{public Form1(){InitializeComponent();}int x = 0;private void button1_Click(object sender, EventArgs e) {if (checkBox1.Checked){x = x + 1;}if (checkBox2.Checked){x =x + 1;}if (checkBox3.Checked){x = x + 1;}MessageBox.Show(x+ "");}}}实训截图：第七题：菱形实训代码：using System;using System.Collections.Generic; using ponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;namespace WindowsApplication5{public partial class Form1 : Form {public Form1(){InitializeComponent();}private void button1_Click(object sender, EventArgs e){label1.Text = "";int a = int.Parse(textBox1.Text);for (int i = 1; i <=a; i++){for (int j = 1; j <= Math.Abs((a+1)/2 - i); j++)label1.Text += " ";for (int k = 1; k <= (a - 2 * Math.Abs((a+1)/2-i)); k++) label1.Text += "*";label1.Text += "\n";}}}}实训代码：using System;using System.Collections.Generic;using ponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;namespace WindowsApplication2{public partial class Form1 : Form{public Form1(){InitializeComponent();}private void button1_Click(object sender, EventArgs e) {jisuan jh = new jisuan();int r = int.Parse(textBox1.Text);label2.Text = jh.Mianji(r).ToString();}}public class jisuan{public double Mianji(int r){double mianji = 1;double pai = Math.PI;mianji = pai * r * r;return mianji;}}}实训截图：第九题：学生类实训代码：using System;using System.Collections.Generic;using ponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;namespace WindowsApplication1{public partial class Form1 : Form{public Form1(){InitializeComponent();}Student x = new Student();private void button1_Click(object sender, EventArgs e) {double en = double.Parse(textBox1.Text);double m = double.Parse(textBox2.Text);double c = double.Parse(textBox3.Text);x.sum(en, m, c);textBox4.Text = "总分是：" + x.Result;}private void button2_Click(object sender, EventArgs e) {double en = double.Parse(textBox1.Text);double m = double.Parse(textBox2.Text);double c = double.Parse(textBox3.Text);x.avg(en, m, c);textBox5.Text = "平均分是：" + x.JF;}}public class Student{private double english;private double math;private double chinese;public double English{get{return english;}set{english = value;}}public double Math{get{return math;}set{math = value;}}public double Chinese{get{return chinese;}set{chinese = value;}}private double result;public double Result{get { return result; }set { result = value; }}public void sum(double en, double m, double c) { result = en + m + c; }private double jf;public double JF{get{return jf;}set{jf = value;}}public void avg(double en, double m, double c) {jf = (en + m + c) / 3;}}}实训截图：第十题：学生姓名设置类实训代码：using System;using System.Collections.Generic;using ponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;namespace WindowsApplication1{public partial class Form1 : Form{public Form1(){InitializeComponent();}private void button1_Click(object sender, EventArgs e){label4.Text = "对象值设置完毕！";}private void button2_Click(object sender, EventArgs e){Student x = new Student();x.id = int.Parse(textBox1.Text); = textBox2.Text;x.Sex = textBox3.Text;x.Sex = "女";label4.Text = "学号：" + x.id +" "+ "姓名：" + +" " + "性别：" + x.Sex; }}public class Student{public int id;public string name;private string sex;public string Sex {get {return sex;}set {sex = value;}}}}实训截图：第十一题：银行帐号存取钱实训代码：using System;using System.Collections.Generic;using ponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;namespace银行账号存取钱{public partial class Form1 : Form{public Form1(){InitializeComponent();}Zhang x;private void button1_Click(object sender, EventArgs e){int zh=int .Parse (textBox1 .Text );string ne=textBox2.Text ;int ye=int .Parse (textBox3 .Text );x=new Zhang (zh,ne ,ye );label6.Text = "帐户号是：" + x.K + "\n" + "帐户名是：" + + "\n" + "初始余额是：" + x.Money + "\n";}private void button2_Click(object sender, EventArgs e){int c =int.Parse (textBox4.Text);label6.Text +="帐户余额为：" + x .Deposit (c ) + "元\n"; }private void button3_Click(object sender, EventArgs e){int q = int.Parse(textBox5.Text);if (x.withdraw (q))label6.Text +="帐户余额为："+x.Money +"\n";elselabel6.Text +="余额不足！"+"\n";}private void button4_Click(object sender, EventArgs e){label6.Text = "";textBox1.Text = "";textBox2.Text = "";textBox3.Text = "";textBox4.Text = "";textBox5.Text = "";}}}public class Zhang{private int k;public int K{get {return k ;}set {k = value;}}private string name;public string Name{get {return name ;}set {name = value;}}private int money;public int Money{get {return money ;}set {money = value;}}private int cunqian;public int Cunqian{get {return cunqian;}set {cunqian = value;}}private int quqian;public int Quqian{get {return quqian;}set {quqian = value;}}public Zhang (int k,string name, int money) {this .k = k ;this . name =name ;this . money =money ;}public int Deposit(int d) {money =money +d ;return money ;}public bool withdraw(int w) {if (money < w){ return false; }else{money = money - w;return true;}}}实训截图：第十二题：体重using System;using System.Collections.Generic; using ponentModel;using System.Data;using System.Text;using System.Windows.Forms;namespace体重{public partial class Form1 : Form{public Form1(){InitializeComponent();}private void button1_Click(object sender, EventArgs e) {int a = int.Parse(listBox1.Text);if (a < 0)MessageBox.Show("请输入大于０的数！");else if (a < 50)label2.Text = "您的体重偏瘦！";else if (a <=60)label2.Text = "恭喜您，体重标准！";else if (a <= 80)label2.Text = "您的体重偏重！";elselabel2.Text = "您已超重！";}}}实训截图：第十三题：薪酬using System;using System.Collections.Generic;using ponentModel;using System.Drawing;using System.Text;using System.Windows.Forms;namespace薪酬{public partial class Form1 : Form{public Form1(){InitializeComponent();}Cubiod a;private void summToolStripMenuItem_Click(object sender, EventArgs e){string n = textBox1.Text;int x = int.Parse(textBox2.Text);a = new Cubiod(n, x);MessageBox.Show("员工的人数：" + Cubiod.GetaccoutNumber() + "\n总工资为：" +( Cubiod.Zhongzhi()+100));}private void aboutToolStripMenuItem_Click(object sender, EventArgs e){MessageBox.Show("开发人员姓名:贾洪玉\n" + "学号:09302039");}private void clearToolStripMenuItem_Click(object sender, EventArgs e){textBox1.Clear();textBox2.Clear();label3.Text = null;}private void exitToolStripMenuItem_Click(object sender, EventArgs e){this.Close();}private void payToolStripMenuItem_Click(object sender, EventArgs e){string c = textBox1.Text;int d = int.Parse(textBox2.Text);a = new Cubiod(c, d);label3.Text = "固定工资为：100元，提成系数为0.2\n\n";label3.Text += "姓名为：" + + "\n\n提成为：" + Cubiod.Zhongzhi(); }private void Form1_Load(object sender, EventArgs e){}}}实训截图：。