C++程序设计程序代码例5.10

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C语言程序实例

C语言程序实例

C语言程序实例C语言是一种通用的计算机编程语言,广泛用于系统软件开发和应用软件开发中。

为了帮助读者更好地理解和掌握C语言的应用,本文将介绍一些C语言程序实例,并提供相应的代码和执行结果。

1. Hello, World!"Hello, World!"是最经典的C语言程序实例,它用于展示一个最简单的C程序:```c#include <stdio.h>int main() {printf("Hello, World!\n");return 0;}```运行结果:```Hello, World!```2. 计算两个数的和下面的示例演示了如何编写一个简单的程序来计算两个数的和:```c#include <stdio.h>int main() {int num1, num2, sum;printf("请输入两个整数:");scanf("%d %d", &num1, &num2);sum = num1 + num2;printf("两个数的和为:%d\n", sum);return 0;}```运行结果:```请输入两个整数:2 3两个数的和为:5```3. 判断奇偶数以下示例展示了如何编写一个程序来判断一个数是奇数还是偶数:```c#include <stdio.h>int main() {int num;printf("请输入一个整数:");scanf("%d", &num);if (num % 2 == 0) {printf("%d是偶数\n", num);} else {printf("%d是奇数\n", num);}return 0;}```运行结果:```请输入一个整数:55是奇数```4. 找出最大数以下示例展示了如何编写一个程序来找出给定三个数的最大数:```c#include <stdio.h>int main() {int num1, num2, num3, max;printf("请输入三个整数:");scanf("%d %d %d", &num1, &num2, &num3);max = (num1 > num2) ? (num1 > num3 ? num1 : num3) : (num2 > num3 ? num2 : num3);printf("最大数为:%d\n", max);return 0;}```运行结果:```请输入三个整数:5 2 7最大数为:7```5. 计算阶乘以下示例展示了如何编写一个程序来计算给定正整数的阶乘:```c#include <stdio.h>int main() {int num, i;unsigned long long factorial = 1;printf("请输入一个正整数:");scanf("%d", &num);for (i = 1; i <= num; i++) {factorial *= i;}printf("%d的阶乘为:%llu\n", num, factorial);return 0;}```运行结果:```请输入一个正整数:55的阶乘为:120```通过以上的C语言程序实例,读者可以学习到不同应用场景下C语言的基本语法和常用操作。

C语言程序设计经典10例

C语言程序设计经典10例

C语言程序设计经典10例程序1题目:输入三个整数x,y,z,请把这三个数由小到大输出。

1.程序分析:我们想办法把最小的数放到x上,先将x与y进行比较,如果x>y则将x与y的值进行交换,然后再用x与z进行比较,如果x>z则将x与z的值进行交换,这样能使x最小。

2.程序源代码:代码如下:#include <stdio.h>int main(){int x,y,z,t;scanf("%d%d%d",&x,&y,&z);if (x>y){t=x;x=y;y=t;} /*交换x,y的值*/if(x>z){t=z;z=x;x=t;} /*交换x,z的值*/if(y>z){t=y;y=z;z=t;} /*交换z,y的值*/printf("small to big: %d %d %d\n",x,y,z);return 0;}程序2题目:用号输出字母C的图案。

1.程序分析:可先用’'号在纸上写出字母C,再分行输出。

2.程序源代码:代码如下:#include <stdio.h>int main(){printf("Hello C-world!\n");printf(" ****\n");printf(" *\n");printf(" * \n");printf(" ****\n");return 0;}程序3题目:输出特殊图案,请在c环境中运行,看一看,Very Beautiful!1.程序分析:字符共有256个。

不同字符,图形不一样。

2.程序源代码:代码如下:#include <stdio.h>int main(){char a=176,b=219;printf("%c%c%c%c%c\n",b,a,a,a,b);printf("%c%c%c%c%c\n",a,b,a,b,a);printf("%c%c%c%c%c\n",a,a,b,a,a);printf("%c%c%c%c%c\n",a,b,a,b,a);printf("%c%c%c%c%c\n",b,a,a,a,b);return 0;}程序4题目:输出9*9口诀。

C语言程序设计_05循环结构程序设计

C语言程序设计_05循环结构程序设计

5.2 DO…WHILE循环结构 5.2.1 DO…WHILE语句的格式 DO…WHILE语句的一般格式为: DO 语句 WHILE(表达式); DO…WHILE语句中的表达式表示循环的条件,可 以是任何表达式,常用的是关系表达式和逻辑表达 式。表达式必须加圆括号。语句是重复执行的部分, 称作循环体。
由亍循环体在表达式2乊后表达式3乊前执行所以把循环体语句放在表达式3的开头循环体语句不原来的i构成逗号表达式作为循环语句新的表达式3从而也就没有循环体语句了
第5章 循环结构程序设计
5.1 WHILE循环结构 5.2 DO…WHILE循环结构 5.3 FOR循环结构 5.4 与循环有关的控制语句 5.5 3种循环语句的比较 5.6 循环的嵌套 5.7 循环结构程序举例 本章小结
图5-6 FOR语句执行过 程
FOR语句的执行过程如图5-6所示。具体由以下几步 完成: (1)求表达式1。 (2)求表达式2,并判定其值为0或非0。若值为非0, 转步骤(3);否则结束FOR语句。 (3)执行语句,然后求表达式3。 (4)转向步骤(2)。 由FOR语句的执行流程可知,表达式1的作用是为循 环控制的有关变量赋初值,表达式2是循环控制条件, 表达式3用于修正有关变量,语句是重复执行部分。
【例5.7】输入20个数,求出其中的最大值与最小值。
5.3.3 FOR语句的各种变形 1.在FOR语句中省略表达式 FOR语句中的3个表达式可以部分或全部省略,下面 给出语句的4种基本变形。 (1)表达式1移至FOR语句前,但它后面的分号必 须保留。这时FOR语句的形式为: 表达式1; FOR(; 表达式2; 表达式3) 语句
(2)表达式3移至循环体语句之后,但它前面的分 号必须保留。FOR语句的形式为: FOR(表达式1; 表达式2;) { 语句; 表达式3; } 对于求P=5!的程序段,省略表达式3,将其放在循环 体中,则程序段写成:

C程序设计源代码大全

C程序设计源代码大全

S2_1 #include<iostream>using namespace std;void main(){float a,b,c;cout<<"input a b c\n";cin>>a>>b>>c;if((a+b<c)||(b+c<a)||(a+c<b))cout<<"Not Triangle\n";elsecout<<"Triangle\n";}S2_2#include<iostream>using namespace std;void main(){int year;cout<<"Input year: ";cin>>year;if((year%4==0&&year%100!=0)||(year% 400==0)) cout<<year<<" is a leap year"<<'\n';elsecout<<year<<" is not a leap year"<<'\n';}S2_3#include<iostream>using namespace std;void main(){float a1, a2;char oper;float result;int flag=0;cout<<"请输入简单的运算式:\n"; cin>>a1>>oper>>a2;switch(oper){case'+':result=a1+a2;break;case'-':result=a1-a2;break;case'*':result=a1*a2;break;default:cout<<"输入错误的运算符!\n"; flag=1;}if(flag==0)cout<<a1<<oper<<a2<<"="<<result<<en dl; }S2_4#include<iostream>#include<math.h>using namespace std;void main(){float a,b,c,x1,x2;cout<<"请输入方程的3个系数a b c \n"; cin>>a>>b>>c;x1=(-b+sqrt(b*b-4*a*c))/2*a;x2=(-b-sqrt(b*b-4*a*c))/2*a;if(b*b-4*a*c<0)cout<<"无实根!\n";elsecout<<"x1="<<x1<<endl;cout<<"x2="<<x2<<endl;}S3_1#include<iostream>using namespace std;void main(){int x,y;for(x=1;x<=30;x++)for(y=1;y<=30;y++)if(x+y==30&&2*x+4*y==90) cout<<"鸡有1"<<x<<'\n'<<"兔有"<<y<<endl; }S3_2#include<iostream.h>void main(){int a0,a1,a2;int b;for(a2=1;a2<=9;a2++)for(a1=1;a1<=9;a1++)for(a0=1;a0<=9;a0++){b=100*a2+10*a1+a0;if(b==a2*a2*a2+a1*a1*a1+a0*a0*a0) cout<<b<<endl;}}S3_3#include<iostream.h>void main(){int a0,a1,a2;int b;for(b=100;b<=999;b++){a2=b/100;a1=(b/10)%10;a0=b%10;if(b==a0*a0*a0+a1*a1*a1+a2*a2*a2) cout<<b<<'\t';}}S3_4#include<iostream.h>void main(){int a,b,c;for(a=1;a<=36;a++)for(b=1;b<=36;b++)for(c=1;c<=36;c++)if(a+b+c==36&&a*4+b*2+c/2==36&&c %2==0)cout<<"男人"<<a<<'\n'<<"女人"<<b<<'\n'<<"小孩"<<c<<endl; }S3_5_1#include<iostream.h>void main(){int a;for(a=1;a<=599;a++){if((a%10==5||(a/10)%10==5||(a/10/10)% 10==5)&&(a%3==0)) cout<<a<<endl;}}S3_5_2#include<iostream.h> void main(){int a,b,c=0;cout<<"请输入整数:"; cin>>a;while(a){ b=a%10;c=c+b;a=a/10;}cout<<c<<endl;}S4_1#include<iostream.h> void main(){int a,b;int x,t;cout<<"请输入两个正整数:"; cin>>a>>b;x=a*b;if(a<b){t=a;a=b;b=t;}while(t=a%b){a=b;b=t;}cout<<"最大公约数:"<<b<<endl; cout<<"最小公倍数:"<<x/b<<endl; }S4_2#include<iostream.h>void main(){int a, b,c;cout<<"Input three number:"; cin>>a>>b>>c;for(int i=a;;i--)if(a%i==0&&b%i==0&&c%i==0) break;cout<<i<<endl;}S4_3#include<iostream.h>#include<math.h>void main(){int a;cout<<"请输入一个整数:"; cin>>a;for(int i=2;i<sqrt(a);i++)if(a%i==0)break;if(a%i!=0)cout<<a<<"是素数\n";elsecout<<a<<"不是素数\n";}S4_4#include<iostream.h>void main(){int a,b,c,x;cout<<"Input three number:";cin>>a>>b>>c;for(x=a;;x++)if(x%a==0&&x%b==0&&x%c==0) break;cout<<x<<endl;}S4_5#include<iostream.h>void main(){int a;for(a=100;a<=200;a++){for(int b=2;b<a;b++)if(a%b==0)break;if(a==b)cout<<a<<endl;}}S4_6# include <iostream> using namespace std; int main (){int n,i,sum;for(n=2;n<1000;n++) {//p=n/2;sum=0;for (i=1;i<n;i++) {if (n%i==0)sum =sum+i;}if (sum ==n)cout <<n<<endl;}return 0;}S5_1#include<iostream.h> void main(){int a=2,b=1 ,c=0;for(;b<=7;b++){ c+=a;a=a*10+2;}cout<<c<<endl;}S5_2#include<iostream.h> void main(){int a=2,b=1 ,c=0;for(;b<=7;b++){ c+=a;a=a*10+2;}cout<<c<<endl;}S5_3#include<iostream.h> #include <math.h> double x;int main(){cout<<"Input x :";cin>>x;double y1,y2=x;do{y1=y2;y2=2.0/3.0*y1+x/(3.0*y1*y1); }while(fabs(y1-y2)>=1e-5); cout <<"y="<<y2<<endl;return 0;}S5_4#include<iostream.h>void main(){float x;cout<<"Input x :";cin>>x;int n=1; float g=0;float t=x;do{g+=t;n++;t=-t*x*x/(2*n-1)/(2*n-2); }while(n<=10);cout<<g<<endl;}S6_1include<iostream.h> double abc(double x){double y;y=2*x*x+3*x+5;return y;}void main(){double a,b;a=abc(1);b=abc(1.2);cout<<"a="<<a<<endl; cout<<"b="<<b<<endl; }S6_2#include<iostream.h> #include<math.h> float f(float x) {float y;y=x*x+3*x-4;return y;}float df( float x) {float y;y=2*x+3;return y;}void main(){float x0,x1;x1=0;do{x0=x1;x1=x0-f(x0)/df(x0);} while(fabs(f(x0))>=1e-5); cout<<"x="<<x1<<endl;}S6_3#include<iostream.h>#include<cmath>float f(float x){return x*x+3*x-4;}void main(){float x1,x2,x0;do{cout<<"请输入初值x1和x2: "; cin>>x1>>x2;}while(f(x1)*f(x2)>0); do{x0=(x1+x2)/2;if(f(x0)*f(x1)>0)x1=x0;elsex2=x0;}while(fabs(f(x0))>=1e-5);cout<<"x="<<x0<<endl;}S6_4#include<iostream.h>#include<cmath>float f(float x){return x*x+3*x-4;}void main(){float x1,x2,x0;do{cout<<"请输入初值x1和x2: "; cin>>x1>>x2;}while(f(x1)*f(x2)>0); do{x0=(x1*f(x2)-x2*f(x1))/(f(x2)-f(x1));if(f(x0)*f(x1)>0)x1=x0;elsex2=x0;}while(fabs(f(x0))>=1e-5);cout<<"x="<<x0<<endl;}S7_1 #include<iostream.h>int prime(int x){for(int i=2;i<x/2;i++)if(x%i==0)return 0;return 1;}void main(){for(int x=100;x<=200;x++) {if(prime(x)==1)cout<<x<<'\t';}}S7_2#include<iostream.h>int prime(int num){for(int i=2;i<num/2;i++) if(num%i==0)return 0;return 1;}void main(){int n;cout<<"请输入一个整数n: "; cin>>n;for(int i=2;i<n/2;i++){if(n%i==0&&prime(i)==1) cout<<i<<'\t';}cout<<endl;}S7_3#include<iostream.h>int prime(int a){for(int i=2;i<a/2;i++)if(a%i==0)return 0;return 1;}void main(){int n;do{cout<<"输入一个不小于6的偶数: "; cin>>n;}while(n%2!=0||n<6);for(int i=2;i<n/2;i++){if(prime(i)==1&&prime(n-i)==1)cout<<n<<'='<<i<<'+'<<n-i<<'\n';}cout<<endl;}S7_4#include<iostream.h>int fun(int x){int a,b=1;while(x){a=x%10;b=b*a;x=x/10;}return b;}void main(){int n,mul;cout<<"请输入一个整数(输入0结束): "; cin>>n;while(n){mul=fun(n);cout<<n<<"的各位数之积为"<<mul<<endl; cout<<"请输入一个整数(输入0结束):"; cin>>n;}}S8_1#include<iostream.h>void main(){int a[6]={9,8,7,6,5,4};int i,j,t;int n=6;for(i=0;i<n-1;i++)for(j=0;j<n-i-1;j++){if (a[j]>a[j+1]){t=a[j];a[j]=a[j+1];a[j+1]=t;}}for(i=0;i<n;i++)cout<<a[i]<<'\t';cout<<endl;}S8_2#include<iostream.h> void main(){int a[6]={9,8,7,6,5,4}; int i,j,min,t;int n=6;for(j=0;j<n-1;j++){min=j;for(i=j;i<n;i++)if(a[min]>a[i])min=i;t=a[min];a[min]=a[j];a[j]=t;}for(i=0;i<n;i++)cout<<a[i]<<'\t';cout<<endl;}S8_3#include<iostream.h>void main(){int a[10]={2,5,78,4,6,3,89,12,15,34}; int i,max;int n=10;max=0;for(i=0;i<10;i++){if(a[i]>a[max])max=i;}cout<<"max="<<a[max]<<" "<<"maxindex="<<max+1<<endl; }S8_4#include<iostream.h>void main(){int a[5]={8,16,5,14,1};int i,j,n=5;for(i=0;i<n/2;i++){ j=a[i];a[i]=a[n-1-i];a[n-1-i]=j;}for(i=0;i<n;i++)cout<<a[i]<<'\t';}S9_1#include<iostream.h>void main(){int i,j,row=0,colum=0,max;inta[4][4]={{5,12,23,56},{19,28,37,46},{-12, -34,6,8},{4,6,34,1}}; max=a[0][0];for(i=0;i<4;i++)for(j=0;j<4;j++)if(a[i][j]>max){max=a[i][j];row=i;colum=j;}cout<<"max="<<max<<",row="<<ro w<<",colum="<<colum<<endl;}S9_2#include<iostream.h>void main(){int i,j,k;int colum,saddle,max,flag=0;inta[4][4]={{5,12,23,56},{19,28,37,46},{-12, -34,-6,8},{4,6,34,10}}; for(i=0;i<4;i++){max=a[i][0];for(j=0;j<4;j++)if(a[i][j]>max){max=a[i][j];colum=j;}for(k=0;k<4;k++)if(a[k][colum]<max)max=a[k][colum];if(a[k][j]<max){flag=1;saddle=max;break;}}if(flag=1)cout<<"saddle="<<saddle<<",row="<<i<<",colum= "<<colum<<endl; elsecout<<"No Saddle!\n";}S9_3_1#include<iostream.h>void main(){int i,j,k,n=4;inta[4][4]={{1,2,3,4},{5,6,7,8},{9,10,11,12},{ 13,14,15,16}}; for(i=0;i<n;i++)for(j=i;j<n;j++){k=a[i][j];a[i][j]=a[j][i];a[j][i]=k;}for(i=0;i<n;i++){for(j=0;j<n;j++){cout<<a[i][j]<<'\t';}cout<<endl;}}S9_3_2#include<iostream.h>void main(){int a[9][9];for(int i=1;i<=9;i++)for(int j=1;j<=i;j++)a[i-1][j-1]=i*j;for(int b=0;b<9;b++){for(int c=0;c<=b;c++)cout<<b+1<<"*"<<c+1<<"="<<a[ b][c]<<"\t"; cout<<endl;}}S9_4#include<iostream.h>void main(){int i,j,a[10][10]={0};a[0][0]=a[1][0]=a[1][1]=1;for(i=2;i<=9;i++){a[i][0]=1;a[i][i]=1;for(j=1;j<=9;j++)a[i][j]=a[i-1][j-1]+a[i-1][j]; }for(i=0;i<=9;i++)for(j=0;j<=i;j++){cout<<a[i][j]<<'\t';if(j==i)cout<<'\n';}} S10_1#include<iostream.h>int gys(int m,int n){int r;if(m<n){r=m;m=n;n=r;}while(r=m%n){m=n;n=r;}return n;}void main(){inta[8]={26,1007,956,705,574,371,416,517}; int b[8]={994,631,772,201,262,763,1000,781 };int c[8];for(int i=0;i<8;i++) c[i]=gys(a[i],b[i]); for(i=0;i<8;i++) cout<<c[i]<<'\t'; cout<<endl;}S10_2#include<iostream.h> int fun(int x){int sum=0;while(x){sum+=x%10;x=x/10;}return sum;}void main(){ int a[10],b[10];int sum=0;cout<<"请输入10个整数: \n"; for(int i=0;i<10;i++)cin>>a[i];for(i=0;i<10;i++){b[i]=fun(a[i]);sum+=a[i];}cout<<"sum="<<sum<<endl;for(i=0;i<10;i++)cout<<a[i]<<'\t'<<b[i]<<endl; }S10_3#include<iostream.h>int fun(int x){int sum=0;while(x){sum+=x%10;x/=10;}if(sum==10)return 1;elsereturn 0;}void main(){int a[1001],num=0,x;cout<<"请输入一个大于100小于1000的数:";cin>>x;for(int i=100;i<=x;i++){a[i]=i;if(fun(a[i])==1){cout<<a[i]<<'\t';num++;}}cout<<'\n'<<"共"<<num<<"个"<<'\n'; }S10_4#include<iostream.h>int prime(int num) //函数prime判断参数num是否为素数,若为素数函数返回1,否则返回0{ for(int i=2;i<num/2;i++)if(num%i==0)return 0;return 1;}void main(){int num=0;inta[]={55,154,103,106,151,58,199,10,247,2 18,39,170,87,122,135}; int n=sizeof(a)/sizeof(a[0]);for(int i=0;i<n;i++)if(prime(a[i])==1){cout<<a[i]<<'\t';num++;}cout<<'\n'<<"共"<<num<<"个"<<endl;}S11_1#include<iostream.h>int binary(int array[],int n,int number) { int low=0,high=n-1,mid;while(low<=high){mid=(low+high)/2;if(number<array[mid])high=mid-1;else if(number>array[mid])low=mid+1;elsereturn mid;}return -1;}void main(){inta[]={2,4,6,8,10,12,14,16,18,20,22,24};int num;cout<<"请输入要寻找的数: ";cin>>num;intindex=binary(a,sizeof(a)/sizeof(a[0]),nu m); if(index!=-1)cout<<"该数在数组中的序号为: "<<index<<endl; elsecout<<"数组中没有该元素\n";}S11_2#include<iostream.h>int del(int array[],int n){for(int i=0;i<n-1;i++)if(array[i]==array[i+1]){for(int j=i+2;j<n;j++)array[j-1]=array[j];n=n-1;i=i-1;}return n;}void main(){inta[]={2,2,2,3,4,4,5,6,6,6,6,7,7,8,9,9,10,10,1 0}; int n=del(a,sizeof(a)/sizeof(a[0]) );for(int i=0;i<n;i++)cout<<a[i]<<'\t';cout<<endl;}S11_3#include<iostream.h>int f(int a[],int n){ int c=0;for(int e=n;e>0;e--)if(a[e-1]>a[e]){c=a[e-1];a[e-1]=a[e];a[e]=c;}return n; }void main(){ int s[1000];int i=0,n=0;cout<<"请输入数字(输入0结束):"<<endl; cin>>s[0];while(s[i]!=0){ n=f(s,i);i++;cin>>s[i];}for(int d=0;d<i;d++)cout<<s[d]<<'\t';cout<<endl;}S11_4#include<iostream.h>void main(){int a[]={5,26,98,77,1,27,30};int b[10]={0,0,0,0,0,0,0,0,0,0}; int c, n=sizeof(a)/sizeof(a[0]); for(int i=0;i<n;i++)while(a[i]){c=a[i]%10;b[c]++;a[i]=a[i]/10;}for(int j=0;j<10;j++)cout<<b[j]<<'\t';}S12_1#include<iostream.h>void main(){char s[1000];cout<<"请输入一行字符串:\n"; cin.getline(s,200);int a=0,b=0,c=0;for(int i=0;s[i]!='\0';i++) {if(s[i]>='A'&&s[i]<='Z')a++;else if(s[i]>='a'&&s[i]<='z')b++;else if(s[i]>='0'&&s[i]<='9')c++;}cout<<"大写字母个数:"<<a<<'\t'<<"小写字母个数:"<<b<<'\t'<<"数字字符个数:"<<c<<endl;}S12_2#include<iostream.h>#include<string.h>void main(){char str[100];int flag=0;cout<<"Input a string:\n";cin.getline(str,100);for(int i=0;str[i]!='\0';i++){if(str[i]>='a'&&str[i]<='z'&&flag= =0) {str[i]=str[i]-32;flag=1;}if(str[i]==' '||str[i]=='\n')flag=0;}cout<<"thr result is:\n";cout<<str<<endl;}S12_3#include<iostream.h>#include<string.h>。

C语言代码大全

C语言代码大全

C语言代码大全C语言是一种高级程序设计语言,广泛应用于计算机科学和软件开发领域。

它以其简洁、高效的特点而备受青睐。

本文将为您介绍一些常用的C语言代码,包括输入输出、流程控制、函数调用、数据结构等方面的代码示例。

一、输入输出1. 标准输入输出```c#include <stdio.h>int main() {int num;printf("请输入一个整数:");scanf("%d", &num);printf("您输入的数字是:%d\n", num);return 0;}```2. 文件读写```cint main() {FILE *file;char str[100];// 写入文件file = fopen("data.txt", "w");fprintf(file, "Hello, World!");fclose(file);// 读取文件file = fopen("data.txt", "r");fscanf(file, "%s", str);printf("从文件中读取的内容是:%s\n", str); fclose(file);return 0;}```二、流程控制1. 条件语句```cint main() {int num = 10;if (num > 0) {printf("该数字是正数。

\n"); } else if (num < 0) {printf("该数字是负数。

\n"); } else {printf("该数字是零。

\n"); }return 0;}```2. 循环语句```c#include <stdio.h>int main() {int num = 5;// while循环while (num > 0) {printf("当前数字:%d\n", num); num--;}// for循环for (int i = 0; i < 5; i++) {printf("当前数字:%d\n", i);}// do-while循环do {printf("当前数字:%d\n", num); num++;} while (num < 5);return 0;}```三、函数调用```c#include <stdio.h>int add(int a, int b) {return a + b;}int main() {int num1 = 5;int num2 = 3;int result = add(num1, num2);printf("两个数的和为:%d\n", result); return 0;}```四、数据结构1. 数组```c#include <stdio.h>int main() {int arr[5] = {1, 2, 3, 4, 5};for (int i = 0; i < 5; i++) {printf("数组元素:%d\n", arr[i]); }return 0;}```2. 结构体```c#include <stdio.h>struct Student {char name[20];int age;};int main() {struct Student stu1;strcpy(, "Tom");stu1.age = 18;printf("学生姓名:%s\n", ); printf("学生年龄:%d\n", stu1.age); return 0;}```以上只是C语言代码中的一小部分示例,C语言是一门非常庞大的编程语言,拥有众多的功能和特性。

c语言代码大全

c语言代码大全

c语言代码大全C语言代码大全。

C语言作为一种通用的高级语言,被广泛应用于系统程序设计和应用程序开发。

它具有高效的系统编程能力和灵活的应用程序编程能力,因此备受程序员们的喜爱。

在本文中,我们将为您介绍一些常见的C语言代码,帮助您更好地理解和运用C语言。

首先,让我们来看一个简单的C语言程序示例:```c。

#include <stdio.h>。

int main() {。

printf("Hello, World!\n");return 0;}。

```。

在这个示例中,我们使用了`#include`指令来包含标准输入输出库文件`stdio.h`,然后定义了一个`main`函数,函数内部使用`printf`函数打印了一条简单的消息,并通过`return 0`语句返回了程序执行的结果。

接下来,让我们看一下如何使用C语言实现一个简单的计算器功能:```c。

#include <stdio.h>。

int main() {。

char operator;double firstNumber,secondNumber;printf("Enter an operator (+, -, , /): ");scanf("%c", &operator);printf("Enter two operands: ");scanf("%lf %lf",&firstNumber, &secondNumber);switch(operator) {。

case '+':printf("%.1lf + %.1lf = %.1lf",firstNumber, secondNumber, firstNumber + secondNumber);break;case '-':printf("%.1lf %.1lf = %.1lf",firstNumber, secondNumber, firstNumber secondNumber);break;case '':printf("%.1lf %.1lf = %.1lf",firstNumber, secondNumber, firstNumber secondNumber);break;case '/':printf("%.1lf / %.1lf = %.1lf",firstNumber, secondNumber, firstNumber / secondNumber);break;default:printf("Error! operator is not correct");}。

C语言程序设计 键盘输入和屏幕输出(4.2.9)--5.9节-5.10节

C语言程序设计 键盘输入和屏幕输出(4.2.9)--5.9节-5.10节

2 main()
3{
4
int year, flag;
5
printf("Input a year:");
6
scanf("%d", &year);
7
if (

)
8
{
9
flag = 1;
/* 如果year是闰年,则标志变量flag置1 */
10
}
11
else
12
{
13
flag = 0;
/* 否则,标志变量flag置0 */
100--A
(12)Please enter score:-10↙
Input error!
(13)Please enter score:200↙
Input error!
(14)Please enter score:105↙ Input error!
(15)Please enter score:-5↙ Input error!
5.10 参考习题 5.5 中判断闰年的方法,编程从键盘输入某年某月(包括闰年), 用 switch 语句编程输出该年的该月拥有的天数。要求考虑闰年以及输入月份不在合法范围内的 情况。已知闰年的 2 月有 29 天,平年的 2 月有 28 天。
【参考答案】程序的运行结果应为:
① Input year,month:2004,2↙ 29 days
2100 is a not leap year! ④ Input a year:2000↙
2000 is a leap year!
5.7 在例 4.2 和第 4 章实验程序的基础上,从键盘输入一个英文字母,如果它是大写英

C语言程序设计及程序代码

C语言程序设计及程序代码

C语言程序设计及程序代码C语言是一种广泛应用于程序设计的高级编程语言,它可以用于开发各种类型的应用程序,包括操作系统、嵌入式系统、游戏等。

C语言有着简洁、高效的特点,使得它成为了很多程序员的首选编程语言之一在C语言中,程序的核心是函数。

一个C程序由一个或多个函数组成,每个函数都是一组语句的集合。

函数可以接受参数并返回一个值。

C语言提供了丰富的库函数,可以方便地进行输入输出、数学运算、字符串操作等。

下面是一个简单的C语言程序示例,通过输入两个数并计算它们的和:```c#include <stdio.h>int maiint num1, num2, sum;printf("请输入第一个数:");scanf("%d", &num1);printf("请输入第二个数:");scanf("%d", &num2);sum = num1 + num2;printf("两个数的和为:%d\n", sum);return 0;```在上述程序中,首先我们在程序开始处包含了`<stdio.h>`头文件,它是C语言标准库中的一个输入输出函数库。

然后,我们定义了一个`main(`函数作为程序的入口。

在函数内部,我们声明了三个整型变量`num1`、`num2`和`sum`,用于存储用户输入的数以及计算结果。

接下来,在使用`printf(`函数输出提示信息后,我们使用`scanf(`函数接受用户输入的两个数并将其赋值给`num1`和`num2`变量。

然后,我们使用`sum = num1 + num2`语句计算两个数的和。

最后,我们使用`printf(`函数输出计算结果,并通过`return 0`语句结束程序。

通过这个简单的例子,我们可以看出C语言的基本语法结构是很简洁和易于理解的。

除了基本的输入输出操作,C语言还提供了丰富的语法和数据类型,可以进行循环、条件判断、数组、指针等操作,使得程序设计更加灵活和高效。

c语言程序代码

c语言程序代码

1.要求在屏幕上输出下一行信息。

This is a c program.程序:#include<stdio.h>int main(){printf(“this is a c program.\n”);return 0;}2.求两个整数之和。

程序:#include<stdio.h>int main(){int a,b,sum;a=122;b=234;sum=a+b;printf(“sum is %d\n”,sum);return 0;}3.求两个整数之间的较大者。

#include<stdio.h>int main(){int max(int x,int y);int a,b,c;scanf("%d,%d",&a,&b);c=max(a,b);printf("max=%d\n",c);return 0;}int max(int x,int y){int z;if(x>y)z=x;else z=y;return(z);}4.有人用温度计测量出华氏发表示的温度(如69°F),今要求把她转换成以摄氏法表示的温度(如20℃)。

公式:c=5(f-32)/9.其中f代表华氏温度,c代表摄氏温度。

#include<stdio.h>int main(){float f,c;f=64.0;c=(5.0/9)*(f-32);printf("f=%f\nc=%f\n",f,c);return 0;}5.计算存款利息。

有1000元,想存一年。

有一下三种方法可选:(1)活期:年利率为r1;(2)一年定期:年利率为r2;(3)存两次半年定期:年利率为r3。

分别计算一年后按三种方法所得到的本息和。

程序:#include<stdio.h>int main(){floatp0=1000,r1=0.0036,r2=0.0225,r3=0.0198,p1,p2,p3;p1=p0*(1+r1);p2=p0*(1+r2);p3=p0*(1+r3/2)*(1+r3/2);printf("p1=%f\np2=%f\np3=%f\n",p1,p2,p3);return 0;}6.给定一个大写字母,要求以小写字母输出。

《C语言程序设计教程》习题参考答案

《C语言程序设计教程》习题参考答案

《C语言程序设计教程》习题参考答案《C语言程序设计教程》习题参考答案祝胜林主编华南理工大学出版社【习题1】 (1)【习题2】 (2)【习题3】 (3)【习题4】 (5)【习题5】 (8)【习题6】 (11)【习题7】 (14)【习题8】 (17)【习题9】 (17)【习题10】 (20)一、简答题(在课本中寻找答案,略)1.1C程序的基本结构包括哪些内容?1.2如何定义标识符?1.3输入格式、输出格式的组成包括哪些内容?1.4C语言函数分为哪两类?1.5计算表达式的值应该考虑哪些方面?1.6上机调试程序的步骤如何?二、判断并改错1.7C程序执行的入口是main()函数,所以main函数必须放在程序的开头。

错误:main函数可以放在程序的任何位置。

并不限定在程序的开头。

1.8定义一个函数包括数据说明部分和执行语句部分,两者可以交叉出现。

错误:不可以交叉出现,数据说明部分在执行语句部分的前面。

1.9编辑与编译不是一回事。

错误:不是一回事。

编辑完成源程序的输入和修改;编译是对源程序进行语法检查,如果无语法错误,则生成目标程序。

1.10scanf("%d,%d",&x,&y);的正确输入格式:3,4<回车>。

正确1.11注释内容太多会影响程序的执行效率。

错误:不会影响程序的执行效率。

因为在编译时,编译系统将注释内容删除或用空格代替,所以注释内容不会编译到目标程序中。

1.12所有的数学公式可以直接出现在源程序中。

错误:数学公式需要转换成C语言能够接受的公式才能出现在源程序中。

三、编程题1.13在屏幕上输出自己名字的拼音。

提示:中文名字叫?张三?,对应的拼音为?Zhang San?,输出用printf()函数。

1.14 输入圆的半径,求圆的周长,并将结果保留两位小数输出到屏幕上。

提示:定义圆的半径r,圆的周长:2*3.14*r,输出结果保留2位小数可以用%.2f1.15输入两个整数,输出其中最大者。

C程序代码大全

C程序代码大全

C程序代码大全Prepared on 21 November 2021<<endl;cout<<"------------------"<<endl;<<endl;cout<<"pi="<<pi<<" r="<<r<<" s="<<s<<endl;}#include <> 1 c<<endl;;int a[10];double xy[10];cout<<"sizeof(str)="<<sizeof(str)<<endl;cout<<"sizeof(a)="<<sizeof(a)<<endl;cout<<"sizeof(xy)="<<sizeof(xy)<<endl;<<endl;else if (score>=80)cout<<"Your grade is a B."<<endl;else if (score>=70)cout<<"Your grade is a C."<<endl;else if (score>=60)cout<<"Your grade is a D."<<endl;elsecout<<"Your grade is a E."<<endl;}#include <>main(){int n;cout<<"n=";cin>>n;if (n>=0 && n<=100 &&n%2==0)cout<<"n="<<n<<endl;elsecout<<"The "<<n<<" is out of range!"<<endl; }#include <>main(){int a,b,Max;.10for(int i=1;i<=10;i++)cout<<i<<" ";cout<<endl;.1for(int j=10;j>=1;j--)cout<<j<<" ";cout<<endl;.9for(int k=1;k<=10;k=k+2)cout<<k<<" ";cout<<endl;.Zfor(char c='A';c<='Z';c++)cout<<c;cout<<endl;.for(float x=0;x<=;x=x+cout<<x<<" ";cout<<endl;.for(float x1=0;x1<=+2;x1=x1+cout<<x1<<" ";cout<<endl;.+100int s=0;for(int n=1;n<=100;n++)s=s+n;cout<<"s="<<s<<endl;}#include<>main(){.+100int s=0,n=1;while(n<=100) {s=s+n;n++;}cout<<"s="<<s<<endl;.+100int s=0,n=0;do {n++;s+=n;}while(n<100);cout<<"s="<<s<<endl;um;cin>>st[i].name;cin>>st[i].maths;cin>>st[i].physics;cin>>st[i].chemistry;}otal=st[i].maths+st[i].physics+st[i].chemistry; um<<'\t';cout<<st[i].name<<'\t';cout<<st[i].maths<<'\t';cout<<st[i].physics<<'\t';cout<<st[i].chemistry<<'\t';cout<<st[i].total<<endl;}}#include<>main(){ame="<<(*p).name<<endl;cout<<"(*p).sex="<<(*p).sex<<endl;cout<<"(*p).age="<<(*p).age<<endl;cout<<"p->name="<<p->name<<endl;cout<<"p->sex="<<p->sex<<endl;cout<<"p->age="<<p->age<<endl;ame;cout<<"sex:";cin>>(*p).sex;cout<<"age:";cin>>(*p).age;ame="<<(*p).name<<endl;cout<<"(*p).sex="<<(*p).sex<<endl;cout<<"(*p).age="<<(*p).age<<endl;cout<<"-------------------------"<<endl;ame<<'\t';cout<<x[i].sex<<'\t';cout<<x[i].age<<endl;}cout<<"----------------"<<endl;;int int_values[] = {51, 23, 2, 44, 45,0,11};float float_values[] = {, , , , };student st_arr[]={101,"WangLin",92,102,"LiPing",85,103,"ZhaoMin",88};um<<" ";cout<<st_arr[i].name<<" ";cout<<st_arr[i].grade<<endl;}}#include<>otal<a[j].total)swap_Rec(&a[i],&a[j]); <<"\t"<<str_len("This is a test.")<<endl; }#include<>void disp(void); <<endl;}#include<><<endl;cout<<"Exiting program."<<endl;exit(1); <<endl;cout<<"Exiting program."<<endl;exit(1); <<endl;cout<<"Exiting program."<<endl;exit(1); <<endl;cout<<"Exiting program."<<endl;exit(1); <<endl;cout<<"Exiting program."<<endl;exit(1); <<endl;cout<<"Exiting program."<<endl;exit(1); <<endl;cout<<"Exiting program."<<endl;exit(1); <<endl;cout<<"Exiting program."<<endl;exit(1); <<endl;cout<<"Exiting program."<<endl;exit(1); um;cin>>st[i].name;cin>>st[i].grade;fprintf(fp1,"%d %s %f\n",st[i].num,st[i].name,st[i].grade);}fclose(fp1); <<endl; cout<<"Exiting program."<<endl;exit(1); <<endl;cout<<"Exiting program."<<endl;exit(1); <<endl;cout<<"Exiting program."<<endl;exit(1); <<endl;cout<<"Exiting program."<<endl;exit(1); <<endl;cout<<"Exiting program."<<endl;exit(1); <<endl;cout<<"Exiting program."<<endl;exit(1); <<endl;cout<<"Exiting program."<<endl;exit(1); <<endl;cout<<"Exiting program."<<endl;exit(1); <<endl;cout<<"Exiting program."<<endl;exit(1); */putc( 'A', stdin );if( ferror( stdin ) ){perror( "Write error" );clearerr( stdin );}/* See if read causes an error. */printf( "Will input cause an error " );c = getc( stdin );if( ferror( stdin ) ){perror( "Read error" );clearerr( stdin );}}#include<>#include<><<endl;for (i=1; i<=MAX; i++) {cin>>x;(x);}<<endl;}void push(float x) <<endl;for (i=1; i<=MAX; i++) {cin>>x;(x);}<<endl;}void push(float x) <<endl;}~stack(void) << endl; << endl;}<< endl; isp_count();delete p;();}#include<><< endl;}~ex_class() {cout << "The Object destroyed." <<endl;}void set_value(int n);void show_val(char *name);} ;<<endl;}#include<>um :";cout<<num<<endl;}};um :";cout<<<<endl;}um="<<num<<endl;}public: um=";cout<<<<endl;}how_value("(*p)obj2");al="<<val<<endl;DispFirst();}};<<endl;}virtual void aFn2(void) {cout<<"aFn2 is in Base class."<<endl;}<<endl;}};<<endl;}<<endl;<<endl;}<<endl;<<endl;}void aFn2(void) {cout<<"aFn2 is in First derived class."<<endl; }};<<endl;}void aFn2(void){cout<<"aFn2 is in Second derived class."<<endl; }};;cout<<"s1: "<<s1<<endl;cout<<"s2: "<<s2<<endl;10.2f10.5f;cout<<"String: "<<string<<endl;cout<<"p : "<<p<<endl;}#include<>#include <>;int n;1.7320534f << endl;}~stack(void) {cout << "Stack Destroyed." << endl;}void push(T);T pop(void);};<< endl;return;}stck[tos++] = i;}template <class T> T stack<T>::pop(void){if(tos==0){cout << "Stack underflow." << endl;return 0;}return stck[--tos];}irst;cout<<","<<(*theIterator).second<<" ";}cout<<endl;irst;cout<<","<<(*theIterator).second<<" ";}cout<<endl;irst;cout<<","<<(*it).second<<" ";}cout<<endl;econd << " ";elsecout << "[err] ";}cout << endl;}}#include <iostream>#include <string>#include <map>using namespace std;econd;cout<<"\t"<<(*theIterator).first<<endl; }econd;cout<<"\t"<<(*i).first<<endl;}econd;cout<<"\t"<<(*it).first<<endl;}econd;cout<<"\t"<<(*i).first<<endl;}}#include <iostream>#include <valarray>#include <>using namespace std;#define ARRAY_SIZE 3 .入栈for (i=0;i<10;i=i+2)(i);if (!()) {cout << "()=20;" << endl;()=20;}//弹出栈中所有的数据并显示cout<<"stack1: ";while (!()) {cout<<()<<" ";();}cout<<endl;}#include <iostream>#include <list>#include <numeric>using namespace std;//创建一个list容器的实例LISTINT,其存放int型数据typedef list<int> LISTINT;void main(void){//用LISTINT创建一个名为listOne的list对象 LISTINT listOne;//指定i为迭代器变量LISTINT::iterator i;LISTINT::reverse_iterator ir;//从前面向listOne容器中添加数据(2);(1);//从后面向listOne容器中添加数据(3);(4);//从前向后显示listOne中的数据for (i = (); i != (); ++i)cout << *i << " ";cout << endl;//从后向后显示listOne中的数据for (ir =();ir!=(); ++ir)cout << *ir << " ";cout << endl;//从键盘上输入数据for (i = (); i != (); ++i) {cout<<"listOne :";cin>>(*i);}//从前向后显示listOne中的数据for (i = (); i != (); ++i)cout << *i << " ";cout << endl;//bidirectional迭代器不允许加减运算// i=()+1;}#include <iostream>#include <iostream>#include <numeric>#include <vector>#include <list>#include <set>using namespace std;//利用类模板生成类实例typedef vector < int > IntArray;typedef list <int> LISTINT;typedef set<int> SET_INT;int add(int a, int b) {return a+b;}//在main()函数中测试accumulate算法void main (){//--------------------------------------------// accumulate算法对于普通数组的计算//--------------------------------------------- int x[]={1,3,5,7,9};cout<<"x[]:";for (int i=0;i<5;i++)cout<<x[i]<<" ";cout<<endl;cout<<"accumulate(x,x+5,0)=";cout<<accumulate(x,x+5,0)<<endl;int val=100;cout<<"val="<<val<<endl;cout<<"accumulate(x,x+5,val)=";cout<<accumulate(x,x+5,val)<<endl;//--------------------------------------------// accumulate算法对于vector容器的计算//--------------------------------------------- //声明intvector容器和迭代器iiIntArray intvector;IntArray::iterator ii;//向intvector容器中插入元素for (i=1; i<=5; i++) {(i);};//显示intvector容器中的元素值和累加结果cout << "intvector: "<<endl;for (ii=();ii !=();++ii)cout<<(*ii)<<" ";cout<<endl;cout<<"accumulate(),(),0)=";cout<<accumulate(),(),0)<<endl;//--------------------------------------------// accumulate算法对于list容器的计算//--------------------------------------------- //声明list容器对象和迭代器LISTINT::iterator iL;LISTINT list1;//向list1容器对象中插入元素并显示(1);(3);(5);(2);(6);//显示list1容器的元素值和累加结果cout << "list1: "<<endl;for (iL=();iL !=();++iL)cout<<(*iL)<<" ";cout<<endl;cout<<"accumulate(),(),0)=";cout<<accumulate(),(),0)<<endl;//--------------------------------------------// accumulate算法对于set容器的计算//--------------------------------------------- //声明set容器对象和迭代器SET_INT set1;SET_INT::iterator si;//向set1容器中插入元素(5);(20);(10);(15);(25);//显示set1容器的元素值和累加结果cout <<"set1: "<<endl;for (si=();si !=();++si)cout<<(*si)<<" ";cout<<endl;cout<<"accumulate(),(),0)=";cout<<accumulate(),(),0)<<endl;cout<<"accumulate(),(),100)=";cout<<accumulate(),(),100)<<endl;}#include <iostream>#include <algorithm>#include <vector>#include <list>#include <set>#define size 10using namespace std;//产生指定范围的整数随机数int getrand(int min,int max) {int m;m=(max-min);m=min+double(rand())/RAND_MAX*m ;return m;}//利用类模板生成实例typedef vector < int > IntArray;typedef list <int> LISTINT;typedef set<int> SET_INT;//在main()函数中测试accumulate算法void main (){//--------------------------------------------// count算法对于普通数组的计算//--------------------------------------------- int x[size];cout<<"x[]:";for (int i=0;i<size;i++) {x[i]=getrand(1,3);cout<<x[i]<<" ";}cout<<endl;cout<<"count(x,x+size,2)=";cout<<count(x,x+size,2)<<endl;cout<<"count(x+2,x+8,2)=";cout<<count(x+2,x+8,2)<<endl;//--------------------------------------------// count算法对于vector容器的计算//声明intvector容器和迭代器iiIntArray intvector;IntArray::iterator ii;//向intvector容器中插入元素for (i=1; i<size; i++) {(getrand(2,6));};//显示intvector容器中的元素值和统计结果cout << "intvector: ";for (ii=();ii !=();++ii)cout<<(*ii)<<" ";cout<<endl;cout<<"count(),(),4)=";cout<<count(),(),4)<<endl;//--------------------------------------------// count算法对于list容器的计算//--------------------------------------------- //声明list容器对象和迭代器LISTINT::iterator iL;LISTINT list1;//向list1容器对象中插入元素并显示for (i=1; i<size; i++) {(getrand(3,5));};//显示list1容器的元素值和统计结果cout << "list1: ";for (iL=();iL !=();++iL)cout<<(*iL)<<" ";cout<<endl;cout<<"count(),(),3)=";cout<<count(),(),3)<<endl;//--------------------------------------------// count算法对于set容器的计算//--------------------------------------------- //声明set容器对象和迭代器SET_INT set1;SET_INT::iterator si;//向set1容器中插入元素for (i=1; i<size; i++) {(getrand(1,10));};//显示set1容器的元素值和统计结果cout <<"set1: ";for (si=();si !=();++si)cout<<(*si)<<" ";cout<<endl;cout<<"count(),(),5)=";cout<<count(),(),5)<<endl;}#include <iostream>#include <algorithm>#include <string>#include <vector>//如果字符串以'S'开头,则返回trueint MatchFirstChar( const string& str){string s("S") ;return s == (0,1) ;}//测试count_if算法void main(){const int VECTOR_SIZE = 8 ;//生成成员类型为strings的vector容器类typedef vector<string > StringVector ;//定义迭代器类型typedef StringVector::iterator StringVectorIt ;//声明vector容器的对象StringVector NamesVect(VECTOR_SIZE) ;//声明迭代器StringVectorIt start, end, it ;int result = 0 ; // 存放统计数据//初始化vector容器NamesVectNamesVect[0] = "She" ;NamesVect[1] = "Sells" ;NamesVect[2] = "Sea" ;NamesVect[3] = "Shells" ;NamesVect[4] = "by" ;NamesVect[5] = "the" ;NamesVect[6] = "Sea" ;NamesVect[7] = "Shore" ;//设置容器的起始位置和终止位置start = () ;end = () ;//显示NamesVect容器的元素cout << "NamesVect: " ;for(it = start; it != end; it++)cout << *it << " " ;cout <<endl ;//统计并显示NamesVect容器的所有元素中以'S'字符开头的字符串 result = count_if(start, end, MatchFirstChar) ;cout << "Number of elements that start with letter \"S\" = " << result << endl ;//显示NamesVect容器[1,6]之间的元素cout <<"NamesVect[1]--NamesVect[6]: " ;for(it =&NamesVect[1]; it != &NamesVect[7]; it++)cout << *it << " " ;cout <<endl ;//统计并显示NamesVect容器的所有元素中以'S'字符开头的字符串cout << "Number of elements that start with letter \"S\" = " << result << endl ;}#include <iostream>#include <algorithm>#include <vector>using namespace std;//利用类模板生成实例typedef vector < int > IntArray;//显示数组void put_array(int x[],int size) {for(int i=0;i<size;i++)cout<<x[i]<<" ";cout<<endl;}//显示vector容器中的元素void put_vector(IntArray v){IntArray::iterator theIterator;for (theIterator=();theIterator!=();++theIterator){cout<<(*theIterator)<<" ";}cout<<endl;}//在main()函数中测试fill和fill_n算法void main (){//--------------------------------------------// fill和fill_n算法对普通数组的计算//---------------------------------------------int x[]={1,3,5,7,9};cout << "x[]: ";put_array(x,5);//填数处理fill(x+1,x+3,2);cout << "fill(x+1,x+3,2): "<<endl;put_array(x,5);fill_n(x,3,8);cout << "fill_n(x,3,8): "<<endl;put_array(x,5);//--------------------------------------------// fill和fill_n算法对于vector容器的计算//---------------------------------------------//声明intvector容器和迭代器iiIntArray intvector;//向intvector容器中插入元素for (int i=1; i<=10; i++) {(i);};//显示intvector容器中的元素值和统计结果cout << "intvector: "<<endl;put_vector(intvector);//填数处理fill(),()+3,2);put_vector(intvector);fill_n(&intvector[5],3,8);cout << "fill_n(&intvector[5],3,8): "<<endl;put_vector(intvector);}#include <iostream>#include <algorithm>#include <vector>#define ARRAY_SIZE 10using namespace std;//利用类模板生成实例typedef vector < int > IntArray;//显示数组void put_array(int x[],int size) {for(int i=0;i<size;i++)cout<<x[i]<<" ";cout<<endl;}//显示vector容器中的元素void put_vector(IntArray v){IntArray::iterator theIterator;for (theIterator=();theIterator!=();++theIterator){cout<<(*theIterator)<<" ";}cout<<endl;}//在main()函数中测试find()算法void main (){int i,value,*p;//--------------------------------------------// find()算法对于普通数组的处理//---------------------------------------------int x[ARRAY_SIZE]={1,3,5,7,9,2,4,6,8,10};cout << "x[]: ";put_array(x,ARRAY_SIZE);//find()算法查找,并显示查找结果for(i=0;i<=2;i++) {cout<<"value=";cin>>value;p=find(x,x+ARRAY_SIZE,value);if (p != x + ARRAY_SIZE) { //查到cout << "First element that matches " << value;cout<< " is at location " << p - x<< endl;}else { //未查到cout << "The sequence does not contain any elements"; cout<< " with value " << value << endl ;}}//声明intvector容器对象IntArray intvector;//向intvector容器中插入元素for (i=1; i<=10; i++) {(i);};//显示intvector容器中的元素值cout << "intvector: ";put_vector(intvector);//find()算法查找,并显示查找结果IntArray::iterator pos;for (i=0;i<=2;i++) {cout<<"value=";cin>>value;pos=find(),(),value);if (pos != ()) { //查到cout << "First element that matches " << value;cout<< " is at location " <<pos - ()<< endl;}else { //未查到cout << "The sequence does not contain any elements"; cout<< " with value " << value << endl ;}}}#include <iostream>#include <algorithm>#include <vector>#define ARRAY_SIZE 10using namespace std;//利用类模板生成实例typedef vector < int > IntArray;//显示数组void put_array(int x[],int size) {for(int i=0;i<size;i++)cout<<x[i]<<" ";}//显示vector容器中的元素void put_vector(IntArray v){IntArray::iterator theIterator;for (theIterator=();theIterator!=();++theIterator){cout<<(*theIterator)<<" ";}}//在main()函数中测试find()_end()算法void main (){int x[ARRAY_SIZE]={1,3,5,7,9,2,4,6,8,10};cout << "x[]: ";put_array(x,ARRAY_SIZE);cout<<endl;int y[]={5,7,9};cout << "y[]: ";put_array(y,3);cout<<endl;// find_end()算法查找,并显示查找结果int *p=find_end(x,x+ARRAY_SIZE,&y[0],&y[2]);if (p != x + ARRAY_SIZE) { //查到cout << "The first element that matches :" ;put_array(y,3);cout<< " is at location in x" << p - x<< endl;}else { //未查到cout << "The sequence does not contain any elements";cout<< " with value " ;put_array(&x[3],3);}//--------------------------------------------// find_end()算法对vector容器的处理//---------------------------------------------//声明intvector容器对象IntArray intvector;//向intvector容器中插入元素for (int i=1; i<=10; i++) {(i);};//显示intvector容器中的元素值cout << "intvector: ";put_vector(intvector);cout<<endl;IntArray temp;(5);(6);(7);cout << "temp: ";put_vector(temp);cout<<endl;// find_end()算法查找,并显示查找结果IntArray::iterator pos;pos=find_end(),(),(),());if (pos != ()) { //查到cout << "The first element that matches ";put_vector(temp);cout<< " is at location in intvector " <<pos - ()<< endl; }else { //未查到cout << "The sequence does not contain any elements";put_vector(temp);cout<< endl ;}}#include <iostream>#include <vector>#include <algorithm>using namespace std;//返回一个Fibonacci数,其由generate_n()算法调用int Fibonacci1(void){static int r;static int f1 = 0;static int f2 = 1;r = f1 + f2 ;f1 = f2 ;f2 = r ;return f1 ;}//返回一个Fibonacci数,其由generate()算法调用int Fibonacci2(void){static int r;static int f1 = 0;static int f2 = 1;r = f1 + f2 ;f1 = f2 ;f2 = r ;return f1 ;}//定义整型数的vector容器类typedef vector<int > IntVector ;//显示vector容器中的元素void put_vector(IntVector v,char *name){IntVector::iterator theIterator;cout<<name<<":"<<endl;for (theIterator=();theIterator!=();++theIterator){cout<<(*theIterator)<<" ";}cout<<endl;}//测试generate()和generate_n()算法void main(){const int VECTOR_SIZE = 15 ;//定义迭代器类typedef IntVector::iterator IntVectorIt ;//声明vector容器对象IntVector Numbers1(VECTOR_SIZE),Numbers2(VECTOR_SIZE); int i ;//初始化vector容器对象Numbers1[i] = i ;//显示vector容器对象的元素cout << "Before calling generate_n:" << endl ;put_vector(Numbers1,"Numbers1");//利用generate_n算法用Fibonacci 数填充vector容器 generate_n(), VECTOR_SIZE, Fibonacci1) ;//显示vector容器对象的元素cout << "After calling generate_n:" << endl ;put_vector(Numbers1,"Numbers1");//利用generate算法用Fibonacci 数填充vector容器generate(),(), Fibonacci2) ;//显示vector容器对象的元素cout << "After calling generate:" << endl ;put_vector(Numbers2,"Numbers2");}#include <iostream>#include <algorithm>#include <vector>using namespace std;//利用类模板生成实例typedef vector < int > IntArray;//显示数组void put_array(int x[],int size) {for(int i=0;i<size;i++)cout<<x[i]<<" ";cout<<endl;}//显示vector容器中的元素void put_vector(IntArray v){IntArray::iterator theIterator;for (theIterator=();theIterator!=();++theIterator){ cout<<(*theIterator)<<" ";}cout<<endl;}//在main()函数中测试reverse()和reverse_copy()算法void main (){//--------------------------------------------// reverse()和reverse_copy()算法对普通数组处理//---------------------------------------------int x[]={1,3,5,7,9};cout<<"x[]:";put_array(x,5);//reverse()反转x数组并显示reverse(x,x+5);put_array(x,5);int y[]={2,4,6,8,10};cout<<"y[]:";put_array(y,5);//reverse_copy()反转y数组的部分元素并拷贝到x数组第2个元素位置 reverse_copy(y+1,y+3,x+1);cout<<"x[]:";put_array(x,5);cout<<"y[]:";put_array(y,5);//--------------------------------------------// reverse()和reverse_copy()算法对vector容器的处理//---------------------------------------------//声明intvector容器和迭代器iiIntArray intvector;//向intvector容器中插入元素for (int i=1; i<=10; i++) {(i);};//显示intvector容器中的元素值cout << "intvector: "<<endl;put_vector(intvector);//reverse()对于vector容器的处理reverse(),());cout << "intvector: "<<endl;put_vector(intvector);// reverse_copy对于vector容器的处理IntArray temp(5);reverse_copy()+2,()+7,());cout << "temp: "<<endl;put_vector(temp);}#include <iostream>#include <algorithm>#include <vector>#include <>#define ARRAY_SIZE 15using namespace std;//定义整型数的vector容器类typedef vector<int > IntVector ;//显示数组void put_array(int x[],int size) {for(int i=0;i<size;i++)cout<<x[i]<<" ";cout<<endl;}//显示vector容器中的元素void put_vector(IntVector v,char *name){IntVector::iterator theIterator;for (theIterator=();theIterator!=();++theIterator){ cout<<(*theIterator)<<" ";}cout<<endl;}//产生指定范围的整数随机数int getrand(int min,int max) {int m;m=(max-min);m=min+double(rand())/RAND_MAX*m ;return m;}//在main()函数中测试sort()和partial_sort()算法void main (){int i;//--------------------------------------------// sort()和partial_sort()算法对普通数组处理//---------------------------------------------//sort()算法处理数组,并显示int x[ARRAY_SIZE];for (i=0;i<ARRAY_SIZE;i++) {x[i]=getrand(1,20);}cout<<"x[]:";put_array(x,ARRAY_SIZE);sort(x,x+ARRAY_SIZE);cout<<"sort(x,x+ARRAY_SIZE):"<<endl;put_array(x,ARRAY_SIZE);//partial_sort()算法对于数组进行处理int y[ARRAY_SIZE];for (i=0;i<ARRAY_SIZE;i++) {y[i]=getrand(1,30) ;}cout<<"y[]:";put_array(y,ARRAY_SIZE);partial_sort(y+2,y+7,y+ARRAY_SIZE);cout<<"partial_sort(y+2,y+7,y+ARRAY_SIZE):"<<endl; put_array(y,ARRAY_SIZE);//--------------------------------------------// sort()和partial_sort()算法对vector容器的处理//---------------------------------------------IntVector Numbers1,Numbers2;for(i=0;i<15;i++) {(getrand(1,30));(getrand(1,30));}put_vector(Numbers1,"Numbers1");put_vector(Numbers2,"Numbers2");//sort()算法处理并显示sort(),());cout<<"After call sort():"<<endl;put_vector(Numbers1,"Numbers1");//partial_sort()算法处理并显示partial_sort()+2,()+7,());。

c数值算法程序大全c5-10

c数值算法程序大全c5-10

5.10Polynomial Approximation from Chebyshev Coefficients 197Sample page from NUMERICAL RECIPES IN C: THE ART OF SCIENTIFIC COMPUTING (ISBN 0-521-43108-5)Copyright (C) 1988-1992 by Cambridge University Press. P rograms Copyright (C) 1988-1992 by Numerical Recipes Software. Permission is granted for internet users to make one paper copy for their own personal use. Further reproduction, or any copying of machine-readable files (including this one) to any server c omputer, is strictly prohibited. To order Numerical Recipes books, d iskettes, or CDROMs visit website or call 1-800-872-7423 (North America only), o r send email to trade@ (outside North America).5.10Polynomial Approximation fromChebyshev CoefficientsYou may well ask after reading the preceding two sections,“Must I store and evaluate my Chebyshev approximation as an array of Chebyshev coefficients for a transformed variable y ?Can’t I convert the c k ’s into actual polynomial coefficients in the original variable x and have an approximation of the following form?”f (x )≈m −1 k =0g k x k(5.10.1)Yes,you can do this (and we will give you the algorithm to do it),but we caution you against it:Evaluating equation (5.10.1),where the coefficient g ’s reflect an underlying Chebyshev approximation,usually requires more significant figures than evaluation of the Chebyshev sum directly (as by chebev ).This is because the Chebyshev polynomials themselves exhibit a rather delicate cancellation:The leading coefficient of T n (x ),for example,is 2n −1;other coefficients of T n (x )are even bigger;yet they all manage to combine into a polynomial that lies between ±1.Only when m is no larger than 7or 8should you contemplate writing a Chebyshev fit as a direct polynomial,and even in those cases you should be willing to tolerate two or so significant figures less accuracy than the roundoff limit of your machine.You get the g ’s in equation (5.10.1)from the c ’s output from chebft (suitably truncated at a modest value of m )by calling in sequence the following two procedures:#include "nrutil.h"void chebpc(float c[],float d[],int n)Chebyshev polynomial coefficients.Given a coefficient array c[0..n-1],this routine generatesa coefficient array d[0..n-1]such that n-1k =0d k y k = n-1k =0c k T k (y )−c 0/2.The methodis Clenshaw’s recurrence (5.8.11),but now applied algebraically rather than arithmetically.{int k,j;float sv,*dd;dd=vector(0,n-1);for (j=0;j<n;j++)d[j]=dd[j]=0.0;d[0]=c[n-1];for (j=n-2;j>=1;j--){for (k=n-j;k>=1;k--){sv=d[k];d[k]=2.0*d[k-1]-dd[k];dd[k]=sv;}sv=d[0];d[0]=-dd[0]+c[j];dd[0]=sv;}for (j=n-1;j>=1;j--)d[j]=d[j-1]-dd[j];d[0]=-dd[0]+0.5*c[0];free_vector(dd,0,n-1);}198Chapter 5.Evaluation of FunctionsSample page from NUMERICAL RECIPES IN C: THE ART OF SCIENTIFIC COMPUTING (ISBN 0-521-43108-5)Copyright (C) 1988-1992 by Cambridge University Press. P rograms Copyright (C) 1988-1992 by Numerical Recipes Software. Permission is granted for internet users to make one paper copy for their own personal use. Further reproduction, or any copying of machine-readable files (including this one) to any server c omputer, is strictly prohibited. To order Numerical Recipes books, d iskettes, or CDROMs visit website or call 1-800-872-7423 (North America only), o r send email to trade@ (outside North America).void pcshft(float a,float b,float d[],int n)Polynomial coefficient shift.Given a coefficient array d[0..n-1],this routine generates acoefficient array g [0..n-1]such that n-1k =0d k y k = n-1k =0g k x k ,where x and y are relatedby (5.8.10),i.e.,the interval −1<y <1is mapped to the interval a <x <b .The array g is returned in d .{int k,j;float fac,cnst;cnst=2.0/(b-a);fac=cnst;for (j=1;j<n;j++){First we rescale by the factor const ...d[j]*=fac;fac *=cnst;}cnst=0.5*(a+b);...which is then redefined as the desired shift.for (j=0;j<=n-2;j++)We accomplish the shift by synthetic division.Syntheticdivision is a miracle of high-school algebra.If younever learned it,go do so.You won’t be sorry.for (k=n-2;k>=j;k--)d[k]-=cnst*d[k+1];}CITED REFERENCES AND FURTHER READING:Acton,F .S.1970,Numerical Methods That Work ;1990,corrected edition (Washington:Mathe-matical Association of America),pp.59,182–183[synthetic division].5.11Economization of Power SeriesOne particular application of Chebyshev methods,the economization of power series ,is an occasionally useful technique,with a flavor of getting something for nothing.Suppose that you are already computing a function by the use of a convergent power series,for examplef (x )≡1−x 3!+x 25!−x 37!+···(5.11.1)(This function is actually sin(√x )/√x ,but pretend you don’t know that.)You might be doing a problem that requires evaluating the series many times in some particular interval,say [0,(2π)2].Everything is fine,except that the series requires a large number of terms before its error (approximated by the first neglected term,say)is tolerable.In our example,with x =(2π)2,the first term smaller than 10−7is x 13/(27!).This then approximates the error of the finite series whose last term is x 12/(25!).Notice that because of the large exponent in x 13,the error is much smaller than 10−7everywhere in the interval except at the very largest values of x .This is the feature that allows “economization”:if we are willing to let the error elsewhere in the interval rise to about the same value that the first neglected term has at the extreme end of the interval,then we can replace the 13-term series by one that is significantly shorter.Here are the steps for doing so:1.Change variables from x to y ,as in equation (5.8.10),to map the x interval into −1≤y ≤1.2.Find the coefficients of the Chebyshev sum (like equation 5.8.8)that exactly equals your truncated power series (the one with enough terms for accuracy).3.Truncate this Chebyshev series to a smaller number of terms,using the coefficient of the first neglected Chebyshev polynomial as an estimate of the error.。

c语言选择程序设计(第五章)习题答案

c语言选择程序设计(第五章)习题答案
printf("the final bonu is:%f\n",bonus);
}*/

//*****采用switch语句编写*****//
void main()
{
long i;
float bonus;
scanf("%ld",&i);
int g=i/100000;
switch(g)
else if(i<=1000000)
bonus=(i-600000)*0.015+200000*0.03+200000*0.05+100000*0.075+100000*0.1; //bonus=(i-600000)*0.015+bonus6;
else
bonus=(i-1000000)*0.01+400000*0.015+200000*0.03+200000*0.05+100000*0.075+100000*0.1; //bonus=(i-1000000)*0.01+bonus10;
bonus=(i-200000)*0.05+100000*0.075+100000*0.1; //bonus=(i-200000)*0.05+bonus2;
else if(i<=600000)
bonus=(i-400000)*0.03+200000*0.05+100000*0.075+100000*0.1; //bonus=(i-400000)*0.03+bonus4;
case 9:
bonus=(i-600000)*0.015+200000*0.03+200000*0.05+100000*0.075+100000*0.1;//bonus=(i-600000)*0.015+bonus6;

C语言程序设计入门源代码代码集合

C语言程序设计入门源代码代码集合

演示1#include<stdio.h>voidprint_star(void){printf("*****************\n");}voidprint_welcome(void){printf("Clanguage,welcome!\n");}voidmain(){print_star();print_welcome();print_star();getchar();}演示2#include"stdio.h"intsum(inti,intj){return(i+j);}voidmain(){intn1,n2;printf("input2numbers:\n");scanf("%d%d",&n1,&n2);printf("thesum=%d\n",sum(n1,n2)); getchar();}演示3#include"stdio.h"intmaxnum(int,int,int);main(){inta,b,c;printf("Pleaseenter3numbers:\n"); scanf("%d,%d,%d",&a,&b,&c);printf("Maxnumis%d\n",maxnum(a,b,c));return0;}intmaxnum(intx,inty,intz) {intmax=x;if(y>max)max=y;if(z>max)max=z;returnmax;}演示4#include<stdio.h>ints1(intn){intj,s;s=0;for(j=1;j<=n;j++)s=s+j;returns;}intsum(intn){inti,s=0;for(i=1;i<=n;i++)s=s+s1(i);returns;}voidmain(){intn;printf("n:");scanf("%d",&n);printf("s=%d\n",sum(n)); }演示5#include<stdio.h>voidfunc(intn){inti;for(i=n-1;i>=1;i--)n=n+i;printf("n=%d\n",n);}voidmain(){intn;printf("Inputn:");scanf("%d",&n);func(n);printf("n=%d\n",n);}演示6#include<stdio.h>voidswap(inta,intb){inttemp;temp=a;a=b;b=temp;printf("swap:a=%d,b=%d\n",a,b); }voidmain(){inta,b;a=3;b=10;swap(a,b);printf("a=%d,b=%d\n",a,b);}演示7#include<stdio.h>intfunc(inta,intb){intc;c=a+b;returnc;}voidmain(){intx=6,y=7,z=8,r;r=func((x--,y++,x+y),z--);printf("%d\n",r);}演示8#include<stdio.h>max(floatx,floaty){returnx>y?x:y;}voidmain(){printf("%d\n",max(2,3.5)); }演示9#include<stdio.h>intsum(intn){inti,s=0;for(i=0;i<=n;i++)s=s+i;returns;}voidmain(){intm,sn;scanf("%d",&m);sn=sum(m);printf("thesumis%d\n",sn); }演示10#include<stdio.h>voidswap(intx,inty);intmain(){inta,b;printf("input2numbers:\n"); scanf("%d,%d",&a,&b);printf("inputnumberis:a=%d,b=%d\n",a,b);swap(a,b);printf("input2numbersis:a=%d,b=%d\n",a,b);return0;}voidswap(intx,inty){inttemp;temp=x;x=y;y=temp;printf("swapnumberis:x=%d,y=%d\n",x,y);}演示11#include"stdio.h"#defineK3#defineN5longf2(intn,intk){longpower=n;inti;for(i=1;i<k;i++)power*=n;returnpower;}longf1(intn,intk){longsum=0;inti;for(i=1;i<=n;i++)sum=sum+f2(i,k);returnsum;}intmain(void){printf("sumof%dpowerofintegerfrom1to%d=",K,N); printf("%ld\n",f1(N,K));return0;}演示12#include<stdio.h>intmin(inta,intb);intmain(void){intj,k,mininum;printf("input2integers:");scanf("%d,%d",&j,&k);mininum=min(j,k);printf("\nofthetwovalues%dand%d,themininumis%d\n",j,k,mininum);return0;}intmin(inta,intb){if(a<b)returna;elsereturnb;}演示13#include<stdio.h>intfunc(inta,intb);voidmain(){intk=4,m=1,p;p=func(k,m);printf("%d\n",p);}intfunc(inta,intb){intm=0,i=2;i+=m+1;m=i+a+b;returnm;}演示14#include<stdio.h>intmax(intx,inty){intz;z=x>y?x:y;returnz;}voidmain()externintA,B;//声明外部变量printf("%d\n",max(A,B));}intA=13,B=-8;//定义外部变量演示15#include<stdio.h>intf1(intxb){externintxa;return(xa*xb);}intmain(void){externintxb;intxa=5;printf("xa=%d,xb=%d,result=%d",xa,xb,f1(xa)); return0;}intxa=3,xb=4;演示16#include<stdio.h>voidnum(){externintx,y;inta=15,b=10;x=a-b;y=a+b;}intx,y;voidmain(){inta=7,b=5;x=a+b;y=a-b;num();printf("%d,%d\n",x,y);}演示17#include<stdio.h>voidmain()voidswap();externinta,b;a=3;b=10;swap();printf("a=%d,b=%d\n",a,b);}inta,b;voidswap(){inttemp;temp=a;a=b;b=temp;}演示18#include<stdio.h>voidauto_static(void){intvar_auto=0;staticintvar_static=0;printf("var_auto=%d,var_static=%d\n",var_auto++,var_static++); }voidmain(){inti;for(i=0;i<3;i++)auto_static();}演示19#include<stdio.h>voidswap(intx,inty){intt;t=x;x=y;y=t;}voidmain(){inta,b;scanf("%d,%d",&a,&b);swap(a,b);printf("%d,%d\n",a,b);}----------------------------------------------------------------------------------------------------------#include<stdio.h>intx,y;voidswap(int,,int){intt;t=x;x=y;y=t;}voidmain(){scanf("%d,%d",&x,&y);swap(x,y);printf("%d,%d\n",x,y);}#include<stdio.h>intx,y;voidswap(intx,inty){intt;t=x;x=y;y=t;}voidmain(){scanf("%d,%d",&x,&y);swap(x,y);printf("%d,%d\n",x,y);}----------------------------------------------------------------------------------------------------------------------演示20#include<stdio.h>intfac(intn){staticintf=1;f=f*n;returnf;}voidmain(){inti;for(i=1;i<=5;i++)printf("%d!=%d\n",i,fac(i));}演示21#include"stdio.h"intmain(void){inta=2;intp=a;printf("%d\n",a);{inta=7;printf("%d\n",a);printf("%d\n",p);}printf("%d\n",++a);return0;}演示22#include<stdio.h>intfunc(inta,intb);voidmain(){intk=4,m=1,p;p=func(k,m);printf("%d,",p);p=func(k,m);printf("%d\n",p); }intfunc(inta,intb){staticintm=0,i=2;i+=m+1;m=i+a+b;returnm;}演示23#include<stdio.h>f(intn){intc;if(n==6)c=1;elsec=(f(n+1)+1)*2;returnc;}voidmain(){printf("%d\n",f(1));}演示24#include<stdio.h>longpower(intn){longf;if(n>1)f=power(n-1)*n;elsef=1;returnf;}main(){intn;longx;printf("inputanintegernumber:\n"); scanf("%d",&n);x=power(n);printf("%d!=%ld\n",n,x);getchar();}演示25#include<stdio.h>intfact(){staticinti=5;if(i==0)return1;else{i--;return(i+1)*fact();}}voidmain(){printf("fact=%d\n",fact());}演示26#include<stdio.h>intfun(intk);intw=3;voidmain(){intw=10;printf("%d\n",fun(5)*w);}intfun(intk){if(k==0)returnw;return(fun(k-1)*k);}演示27#include<stdio.h>intfac(intn){registerinti,f=1;for(i=1;i<=n;i++)f=f*i;returnf;}main(){inti;for(i=1;i<=5;i++)printf("%d!=%d\n",i,fac(i)); }演示28#include<stdio.h>age(intn){intc;if(n==1)c=10;elsec=age(n-1)+2;returnc;}voidmain(){printf("%d\n",age(5));}演示29#include<stdio.h>#definePI3.14#definecircuit(r)2*PI*r#definearea(r)PI*r*rvoidmain(){floatra,c,a;scanf("%f",&ra);c=circuit(ra);a=area(ra);printf("ra=%f,c=%f,a=%f",ra,c,a);}汉诺塔(演示30)#include"stdio.h"voidmove(int,char,char,char);intmain(void){intn;printf("inputndiskontowerA:\n");scanf("%d",&n);move(n,'A','B','C');getchar();return0;}voidmove(intn,chara,charb,charc){staticintstep=1;if(n==1){printf("step%d:movediskform%c->%c\n",step++,a,c); }else{move(n-1,a,c,b);move(1,a,b,c);move(n-1,b,a,c);}}演示31#defineLETTER1#include"stdio.h"voidmain(){charstr[20]="CLanguage",c;inti;i=0;while((c=str[i])!='\0'){i++;#ifLETTERif(c>='a'&&c<='z')c=c-32;#elseif(c>='A'&&c<='Z')c=c+32;#endifprintf("%c",c);}}#include<stdio.h>longf(intn){if(n==1||n==2)return1;elsereturnf(n-1)+f(n-2);}voidmain(){longn;printf("inputn:\n");scanf("%d",&n);printf("thenumberis%d\n",f(n)); }。

c语言简单编程实例

c语言简单编程实例

c语言简单编程实例C语言简单编程实例引言:C语言是一种通用的、高效的编程语言,广泛应用于各种计算机系统和软件开发中。

在学习C语言的过程中,编写一些简单的程序实例是非常有帮助的。

本文将给出几个简单的C语言编程实例,帮助初学者掌握基础的编程技巧和思维方式。

一、计算两个数的和题目:编写一个程序,计算输入的两个整数的和并输出结果。

思路:首先通过scanf函数从用户输入中读取两个整数,然后使用加法运算符将两个整数相加,最后通过printf函数将结果输出。

代码示例:```c#include <stdio.h>int main() {int num1, num2, sum;printf("请输入两个整数:");scanf("%d %d", &num1, &num2);sum = num1 + num2;printf("两个整数的和为:%d\n", sum);return 0;}```二、求输入数的平方题目:编写一个程序,计算输入数的平方并输出结果。

思路:与上一个实例类似,首先通过scanf函数从用户输入中读取一个整数,然后使用乘法运算符将该整数与自身相乘,最后通过printf函数将结果输出。

代码示例:```c#include <stdio.h>int main() {int num, square;printf("请输入一个整数:");scanf("%d", &num);square = num * num;printf("该整数的平方为:%d\n", square);return 0;}```三、判断输入数的正负性题目:编写一个程序,判断输入数的正负性并输出结果。

思路:首先通过scanf函数从用户输入中读取一个整数,然后使用if语句判断该整数是否大于0,若大于0则输出正数,若小于0则输出负数,若等于0则输出零。

C程序代码大全

C程序代码大全

<<endl;cout<<------------------<<endl; <<endl;cout<<pi=<<pi<< r=<<r<< s=<<s<<endl; }#include <> 1 c<<endl; ;int a[10]; double xy[10];cout<<sizeof(str)=<<sizeof(str)<<endl;cout<<sizeof(a)=<<sizeof(a)<<endl; cout<<sizeof(xy)=<<sizeof(xy)<<endl; <<endl;else if (score>=80) cout<<Your grade is a B.<<endl; else if (score>=70) cout<<Your grade is a C.<<endl; else if (score>=60) cout<<Your grade is a D.<<endl; else cout<<Your grade is aE.<<endl; }#include <> main() {int n;cout<<=; cin>>n;if (n>=0 && n<=100 &&n%2==0) cout<<=<<n<<endl; elsecout<<The <<n<< is out of range!<<endl; } #include <> main() { int a,b,Max; .10for(int i=1;i<=10;i++) cout<<i<< ; cout<<endl; .1for(int j=10;j>=1;j--) cout<<j<< ; cout<<endl; .9for(int k=1;k<=10;k=k+2) cout<<k<< ; cout<<endl; .Z for(char c='A';c<='Z';c++) cout<<c; cout<<endl;.for(float x=0;x<=;x=x+ cout<<x<< ; cout<<endl; .for(float x1=0;x1<=+2;x1=x1+ cout<<x1<< ;cout<<endl; .+100 int s=0;for(int n=1;n<=100;n++) s=s+n;cout<<s=<<s<<endl; }#include<> main() {.+100int s=0,n=1; while(n<=100) { s=s+n; n++; } cout<<s=<<s<<endl; .+100int s=0,n=0; do { n++; s+=n; }while(n<100);cout<<s=<<s<<endl; um;cin>>st[i].name; cin>>st[i].maths; cin>>st[i].physics; cin>>st[i].chemistry; } otal=st[i].maths+st[i].physics+st[i].chemistry; um<<'\t';cout<<st[i].name<<'\t'; cout<<st[i].maths<<'\t';cout<<st[i].physics<<'\t'; cout<<st[i].chemistry<<'\t';cout<<st[i].total<<endl; } }#include<> main() {ame=<<(*p).name<<endl;cout<<(*p).sex=<<(*p).sex<<endl; cout<<(*p).age=<<(*p).age<<endl; cout<<p->name=<<p->name<<endl;cout<<p->sex=<<p->sex<<endl; cout<<p->age=<<p->age<<endl;ame;cout<<sex:; cin>>(*p).sex; cout<<age:; cin>>(*p).age;ame=<<(*p).name<<endl;cout<<(*p).sex=<<(*p).sex<<endl; cout<<(*p).age=<<(*p).age<<endl; cout<<-------------------------<<endl; ame<<'\t';cout<<x[i].sex<<'\t'; cout<<x[i].age<<endl; } cout<<----------------<<endl; ;int int_values[] = {51, 23, 2, 44, 45,0,11}; float float_values[] = {, , , , }; student st_arr[]={101,WangLin,92,102,LiPing,85,103,ZhaoMin,88}; um<< ;cout<<st_arr[i].name<< ; cout<<st_arr[i].grade<<endl; } } #include<> otal<a[j].total)swap_Rec(&a[i],&a[j]); <<\<<str_len(This is atest.)<<endl; }#include<>void disp(void); <<endl; }#include<> <<endl;cout<<Exiting program.<<endl; exit(1); <<endl;cout<<Exiting program.<<endl; exit(1); <<endl;cout<<Exiting program.<<endl; exit(1); <<endl;cout<<Exiting program.<<endl; exit(1); <<endl;cout<<Exiting program.<<endl; exit(1); <<endl;cout<<Exiting program.<<endl; exit(1); <<endl;cout<<Exiting program.<<endl; exit(1); <<endl;cout<<Exiting program.<<endl; exit(1); <<endl;cout<<Exiting program.<<endl; exit(1); um;cin>>st[i].name; cin>>st[i].grade;fprintf(fp1,%d %s %f\n,st[i].num,st[i].name,st[i].grade);} fclose(fp1); <<endl; cout<<Exiting program.<<endl; exit(1); <<endl;cout<<Exiting program.<<endl; exit(1); <<endl;cout<<Exiting program.<<endl; exit(1); <<endl;cout<<Exiting program.<<endl; exit(1); <<endl;cout<<Exiting program.<<endl; exit(1); <<endl;cout<<Exiting program.<<endl; exit(1); <<endl;cout<<Exiting program.<<endl; exit(1); <<endl;cout<<Exiting program.<<endl; exit(1); <<endl;cout<<Exiting program.<<endl; exit(1); */ putc( 'A', stdin );if( ferror( stdin ) ) {perror( Write error ); clearerr( stdin ); } /* See if read causes an error. */printf( Will input cause an error? ); c = getc( stdin );if( ferror( stdin ) ) {perror( Read error ); clearerr( stdin ); } }#include<> #include<> <<endl;for (i=1; i<=MAX; i++) { cin>>x; (x); }<<endl; } void push(float x) <<endl; for (i=1; i<=MAX; i++) { cin>>x; (x); } <<endl; } void push(float x) <<endl; }~stack(void) << endl; << endl; }<< endl; isp_count(); delete p; (); }#include<> << endl; }~ex_class() { cout << The Object destroyed. <<endl; } void set_value(int n);void show_val(char *name); } ; <<endl; }#include<> um :; cout<<num<<endl; } }; um :;cout<<<<endl; }um=<<num<<endl; }public: um=;cout<<<<endl; } how_value((*p)obj2); al=<<val<<endl;DispFirst(); } }; <<endl; }virtual void aFn2(void) { cout<<aFn2 is in Baseclass.<<endl; }<<endl; } }; <<endl; }<<endl; <<endl; }<<endl; <<endl; }void aFn2(void) {cout<<aFn2 is in First derived class.<<endl; } };<<endl; }void aFn2(void){cout<<aFn2 is in Second derived class.<<endl; } }; ;cout<<s1: <<s1<<endl; cout<<s2: <<s2<<endl; 10.2f10.5f;cout<<String: <<string<<endl; cout<<p : <<p<<endl; }#include<> #include <> ;int n; 1.7320534f << endl; }~stack(void) {cout << Stack Destroyed. << endl; }void push(T); T pop(void); }; << endl;return; }stck[tos++] = i; }template <class T> T stack<T>::pop(void) {if(tos==0) {cout << Stack underflow. << endl; return 0; } return stck[--tos]; } irst;cout<<,<<(*theIterator).second<< ; }cout<<endl; irst;cout<<,<<(*theIterator).second<< ; }cout<<endl; irst;cout<<,<<(*it).second<< ; } cout<<endl;econd << ;else cout << [err] ; }cout << endl; } }#include <iostream> #include <string> #include <map> using namespace std; econd; cout<<\<<(*theIterator).first<<endl; } econd; cout<<\ <<(*i).first<<endl; } econd; cout<<\<<(*it).first<<endl; } econd; cout<<\<<(*i).first<<endl; } }#include <iostream> #include <valarray>#include <> using namespace std; #define ARRAY_SIZE 3 .入栈for (i=0;i<10;i=i+2) (i); if (!()) { cout << ()=20; << endl;()=20; } //弹出栈中所有的数据并显示cout<<stack1: ;while (!()) { cout<<()<< ; (); } cout<<endl; }#include <iostream> #include <list>#include <numeric> using namespace std;//创建一个list容器的实例LISTINT,其存放int型数据typedef list<int> LISTINT; void main(void) {//用LISTINT创建一个名为listOne的list对象LISTINT listOne;//指定i为迭代器变量LISTINT::iterator i;LISTINT::reverse_iterator ir; //从前面向listOne容器中添加数据(2); (1); //从后面向listOne容器中添加数据(3); (4);//从前向后显示listOne中的数据for (i = (); i != (); ++i) cout << *i << ; cout << endl; //从后向后显示listOne中的数据for (ir=();ir!=(); ++ir) cout << *ir << ; cout << endl; //从键盘上输入数据for (i = (); i != (); ++i) { cout<<listOne :;cin>>(*i); } //从前向后显示listOne中的数据for (i = (); i != (); ++i) cout << *i << ; cout << endl; //bidirectional迭代器不允许加减运算// i=()+1; }#include <iostream> #include <iostream> #include <numeric> #include <vector>#include <list> #include <set> using namespace std; //利用类模板生成类实例typedef vector < int > IntArray; typedef list <int> LISTINT; typedef set<int>SET_INT; int add(int a, int b) { return a+b; }//在main()函数中测试accumulate算法void main () {//--------------------------------------------// accumulate算法对于普通数组的计算//---------------------------------------------int x[]={1,3,5,7,9}; 潣瑵?硜嵛尺※for (int i=0;i<5;i++) cout<<x[i]<< ; cout<<endl;cout<<accumulate(x,x+5,0)=; cout<<accumulate(x,x+5,0)<<endl; intval=100; cout<<val=<<val<<endl;cout<<accumulate(x,x+5,val)=; cout<<accumulate(x,x+5,val)<<endl;//--------------------------------------------// accumulate算法对于vector容器的计算//---------------------------------------------//声明intvector容器和迭代器ii IntArray intvector; IntArray::iterator ii; //向intvector容器中插入元素for (i=1; i<=5; i++) { (i); };//显示intvector容器中的元素值和累加结果cout << intvector: <<endl;for (ii=();ii !=();++ii) cout<<(*ii)<< ; cout<<endl;cout<<accumulate(),(),0)=; cout<<accumulate(),(),0)<<endl;//--------------------------------------------// accumulate算法对于list容器的计算//---------------------------------------------//声明list容器对象和迭代器LISTINT::iterator iL; LISTINT list1;//向list1容器对象中插入元素并显示(1); (3); (5); (2); (6); //显示list1容器的元素值和累加结果cout << list1: <<endl;for (iL=();iL !=();++iL) cout<<(*iL)<< ; cout<<endl;cout<<accumulate(),(),0)=; cout<<accumulate(),(),0)<<endl;//-------------------------------------------- // accumulate算法对于set容器的计算//---------------------------------------------//声明set容器对象和迭代器SET_INT set1;SET_INT::iterator si;//向set1容器中插入元素(5); (20); (10); (15); (25); //显示set1容器的元素值和累加结果cout <<set1: <<endl; for(si=();si !=();++si) cout<<(*si)<< ; cout<<endl;cout<<accumulate(),(),0)=; cout<<accumulate(),(),0)<<endl;cout<<accumulate(),(),100)=; cout<<accumulate(),(),100)<<endl; }#include <iostream> #include <algorithm> #include <vector> #include <list>#include <set> #define size 10using namespace std; //产生指定范围的整数随机数int getrand(int min,int max) { int m;m=(max-min);m=min+double(rand())/RAND_MAX*m ; return m; } //利用类模板生成实例typedef vector < int > IntArray; typedef list <int> LISTINT; typedef set<int> SET_INT; //在main()函数中测试accumulate算法void main () {//-------------------------------------------- // count算法对于普通数组的计算//---------------------------------------------int x[size]; 潣瑵?硜嵛尺※for (int i=0;i<size;i++) { x[i]=getrand(1,3); cout<<x[i]<< ; }cout<<endl;cout<<count(x,x+size,2)=; cout<<count(x,x+size,2)<<endl;cout<<count(x+2,x+8,2)=; cout<<count(x+2,x+8,2)<<endl;//-------------------------------------------- // count算法对于vector容器的计算//---------------------------------------------//声明intvector容器和迭代器ii IntArray intvector; IntArray::iterator ii; //向intvector容器中插入元素for (i=1; i<size; i++){ (getrand(2,6)); };//显示intvector容器中的元素值和统计结果cout << intvector: ; for (ii=();ii !=();++ii) cout<<(*ii)<< ; cout<<endl;cout<<count(),(),4)=; cout<<count(),(),4)<<endl;//-------------------------------------------- // count算法对于list容器的计算//---------------------------------------------//声明list容器对象和迭代器LISTINT::iterator iL; LISTINT list1; //向list1容器对象中插入元素并显示for (i=1; i<size; i++) { (getrand(3,5)); }; //显示list1容器的元素值和统计结果cout << list1: ;for (iL=();iL !=();++iL) cout<<(*iL)<< ; cout<<endl;cout<<count(),(),3)=; cout<<count(),(),3)<<endl;//-------------------------------------------- // count算法对于set容器的计算//---------------------------------------------//声明set容器对象和迭代器SET_INT set1;SET_INT::iterator si; //向set1容器中插入元素for (i=1; i<size; i++) { (getrand(1,10)); }; //显示set1容器的元素值和统计结果cout <<set1: ;for (si=();si !=();++si) cout<<(*si)<< ; cout<<endl;cout<<count(),(),5)=; cout<<count(),(),5)<<endl; }#include <iostream> #include <algorithm> #include <string> #include <vector> using namespace std;//如果字符串以'S'开头,则返回true int MatchFirstChar( const string& str) { string s(S) ; return s == (0,1) ; } //测试count_if算法void main() {const int VECTOR_SIZE = 8 ; //生成成员类型为strings的vector容器类typedef vector<string > StringVector ; //定义迭代器类型typedef StringVector::iterator StringVectorIt ; //声明vector容器的对象StringVector NamesVect(VECTOR_SIZE) ; //声明迭代器StringVectorIt start, end, it ; int result = 0 ; // 存放统计数据//初始化vector容器NamesVect NamesVect[0] = She ; NamesVect[1] = Sells ; NamesVect[2] = Sea ; NamesVect[3] = Shells ; NamesVect[4] = y ; NamesVect[5] = he ; NamesVect[6] = Sea ; NamesVect[7] = Shore ;//设置容器的起始位置和终止位置start = () ; end = () ; //显示NamesVect容器的元素cout << NamesVect: ; for(it = start; it != end; it++) cout << *it << ; cout <<endl ; //统计并显示NamesVect容器的所有元素中以'S'字符开头的字符串result = count_if(start, end, MatchFirstChar) ;cout << Number of elements that start with letter \S\ = << result << endl ; //显示NamesVect容器[1,6]之间的元素cout<<NamesVect[1]--NamesVect[6]: ;for(it =&NamesVect[1]; it != &NamesVect[7]; it++) cout << *it<< ; cout <<endl ; //统计并显示NamesVect容器的所有元素中以'S'字符开头的字符串result = count_if(&NamesVect[1], &NamesVect[7], MatchFirstChar) ;cout << Number of elements that start with letter \S\ = << result << endl ; }#include <iostream> #include <algorithm> #include <vector> using namespace std; //利用类模板生成实例typedef vector < int > IntArray; //显示数组voidput_array(int x[],int size) { for(int i=0;i<size;i++) cout<<x[i]<< ; cout<<endl; }//显示vector容器中的元素void put_vector(IntArray v) {IntArray::iterator theIterator; for(theIterator=();theIterator!=();++theIterator){ cout<<(*theIterator)<< ;}cout<<endl; } //在main()函数中测试fill和fill_n算法void main () {//-------------------------------------------- // fill和fill_n算法对普通数组的计算//---------------------------------------------int x[]={1,3,5,7,9}; 潣瑵??硜嵛?? put_array(x,5); //填数处理fill(x+1,x+3,2);cout <<ill(x+1,x+3,2): <<endl; put_array(x,5); fill_n(x,3,8);cout <<ill_n(x,3,8): <<endl; put_array(x,5);//--------------------------------------------// fill和fill_n算法对于vector容器的计算//---------------------------------------------//声明intvector容器和迭代器ii IntArray intvector; //向intvector容器中插入元素for (int i=1; i<=10; i++) { (i); };//显示intvector容器中的元素值和统计结果cout << intvector: <<endl; put_vector(intvector); //填数处理fill(),()+3,2);cout <<ill(),()+3,2): <<endl;put_vector(intvector); fill_n(&intvector[5],3,8);cout <<ill_n(&intvector[5],3,8): <<endl; put_vector(intvector); }#include <iostream> #include <algorithm> #include <vector>#define ARRAY_SIZE 10 using namespace std; //利用类模板生成实例typedef vector < int > IntArray; //显示数组void put_array(int x[],int size) { for(inti=0;i<size;i++) cout<<x[i]<< ; cout<<endl; } //显示vector容器中的元素void put_vector(IntArray v) {IntArray::iterator theIterator; for(theIterator=();theIterator!=();++theIterator){ cout<<(*theIterator)<< ;}cout<<endl; } //在main()函数中测试find()算法void main () { inti,value,*p;//-------------------------------------------- // find()算法对于普通数组的处理//---------------------------------------------int x[ARRAY_SIZE]={1,3,5,7,9,2,4,6,8,10}; 潣瑵??硜嵛??put_array(x,ARRAY_SIZE); //find()算法查找,并显示查找结果for(i=0;i<=2;i++) { cout<<value=; cin>>value;p=find(x,x+ARRAY_SIZE,value); if (p != x + ARRAY_SIZE) { //查到cout << First element that matches << value;cout<< is at location << p - x<< endl; }else { //未查到cout<< The sequence does not contain any elements; cout<< with value << value << endl ; } }//--------------------------------------------// find()算法对于vector容器的处理//---------------------------------------------//声明intvector容器对象IntArray intvector; //向intvector容器中插入元素for (i=1; i<=10; i++) { (i); }; //显示intvector容器中的元素值cout << intvector: ; put_vector(intvector); //find()算法查找,并显示查找结果IntArray::iterator pos; for (i=0;i<=2;i++){ cout<<value=; cin>>value;pos=find(),(),value); if (pos != ()) { //查到cout << First element that matches << value; cout<< is at location<<pos - ()<< endl; }else { //未查到cout << The sequence does not contain any elements; cout<< with value << value << endl ; } } }#include <iostream> #include <algorithm> #include <vector>#define ARRAY_SIZE 10 using namespace std; //利用类模板生成实例typedef vector < int > IntArray; //显示数组void put_array(int x[],int size) { for(inti=0;i<size;i++) cout<<x[i]<< ; } //显示vector容器中的元素voidput_vector(IntArray v) {IntArray::iterator theIterator; for(theIterator=();theIterator!=();++theIterator){ cout<<(*theIterator)<< ;} } //在main()函数中测试find()_end()算法void main () {//--------------------------------------------// find_end()算法对普通数组的处理//---------------------------------------------int x[ARRAY_SIZE]={1,3,5,7,9,2,4,6,8,10}; 潣瑵??硜嵛??put_array(x,ARRAY_SIZE); cout<<endl; int y[]={5,7,9}; cout << y[]: ; put_array(y,3); cout<<endl; // find_end()算法查找,并显示查找结果int *p=find_end(x,x+ARRAY_SIZE,&y[0],&y[2]); if (p != x + ARRAY_SIZE) { //查到cout << The first element that matches : ;put_array(y,3);cout<< is at location in x << p - x<< endl; }else { //未查到cout << The sequence does not contain any elements; cout<< with value ;put_array(&x[3],3); } //-------------------------------------------- // find_end()算法对vector容器的处理//---------------------------------------------//声明intvector容器对象IntArray intvector; //向intvector容器中插入元素for (int i=1; i<=10; i++) { (i); }; //显示intvector容器中的元素值cout << intvector: ; put_vector(intvector); cout<<endl; IntArray temp; (5); (6); (7);cout << emp: ; put_vector(temp); cout<<endl; // find_end()算法查找,并显示查找结果IntArray::iterator pos; pos=find_end(),(),(),()); if (pos != ()) { //查到cout << The first element that matches ;put_vector(temp);cout<< is at location in intvector <<pos - ()<< endl; } else { //未查到cout << The sequence does not contain any elements; cout<< with value ;put_vector(temp); cout<< endl ; } }#include <iostream> #include <vector> #include <algorithm> using namespace std; //返回一个Fibonacci数,其由generate_n()算法调用int Fibonacci1(void) { static int r;static int f1 = 0; static int f2 = 1; r = f1 + f2 ; f1 = f2 ; f2 = r ; return f1 ; }//返回一个Fibonacci数,其由generate()算法调用int Fibonacci2(void) { static int r;static int f1 = 0; static int f2 = 1; r = f1 + f2 ; f1 = f2 ; f2 = r ; return f1 ; }//定义整型数的vector容器类typedef vector<int > IntVector ; //显示vector 容器中的元素void put_vector(IntVector v,char *name) {IntVector::iterator theIterator; cout<<name<<:<<endl;for(theIterator=();theIterator!=();++theIterator){ cout<<(*theIterator)<< ;}cout<<endl; } //测试generate()和generate_n()算法void main() {const int VECTOR_SIZE = 15 ; //定义迭代器类typedef IntVector::iterator IntVectorIt ; //声明vector容器对象IntVector Numbers1(VECTOR_SIZE),Numbers2(VECTOR_SIZE); int i ; //初始化vector容器对象for(i = 0; i < VECTOR_SIZE; i++)Numbers1[i] = i ; //显示vector容器对象的元素cout << Before calling generate_n: << endl ; put_vector(Numbers1,Numbers1); //利用generate_n算法用Fibonacci 数填充vector容器generate_n(), VECTOR_SIZE, Fibonacci1) ; //显示vector容器对象的元素cout << After calling generate_n: << endl ; put_vector(Numbers1,Numbers1); //利用generate算法用Fibonacci 数填充vector容器generate(),(), Fibonacci2) ; //显示vector容器对象的元素cout << After calling generate: << endl ;put_vector(Numbers2,Numbers2); }#include <iostream> #include <algorithm> #include <vector> using namespace std; //利用类模板生成实例typedef vector < int > IntArray; //显示数组voidput_array(int x[],int size) { for(int i=0;i<size;i++) cout<<x[i]<< ; cout<<endl; } //显示vector容器中的元素void put_vector(IntArray v) { IntArray::iterator theIterator; for(theIterator=();theIterator!=();++theIterator){ cout<<(*theIterator)<< ;} cout<<endl; } //在main()函数中测试reverse()和reverse_copy()算法void main () {//--------------------------------------------// reverse()和reverse_copy()算法对普通数组处理//---------------------------------------------int x[]={1,3,5,7,9}; 潣瑵?硜嵛尺※put_array(x,5); //reverse()反转x数组并显示reverse(x,x+5); 潣瑵?硜嵛尺※put_array(x,5); int y[]={2,4,6,8,10}; cout<<y[]:; put_array(y,5); //reverse_copy()反转y数组的部分元素并拷贝到x数组第2个元素位置reverse_copy(y+1,y+3,x+1); 潣瑵?硜嵛尺※put_array(x,5);cout<<y[]:; put_array(y,5);//--------------------------------------------// reverse()和reverse_copy()算法对vector容器的处理//---------------------------------------------//声明intvector容器和迭代器ii IntArray intvector; //向intvector容器中插入元素for (int i=1; i<=10;i++) { (i); }; //显示intvector容器中的元素值cout << intvector: <<endl; put_vector(intvector); //reverse()对于vector容器的处理reverse(),());cout << intvector: <<endl; put_vector(intvector); // reverse_copy对于vector容器的处理IntArray temp(5);reverse_copy()+2,()+7,()); cout << emp: <<endl;put_vector(temp); }#include <iostream> #include <algorithm> #include <vector> #include <>#define ARRAY_SIZE 15 using namespace std; //定义整型数的vector容器类typedef vector<int > IntVector ; //显示数组void put_array(int x[],int size){ for(int i=0;i<size;i++) cout<<x[i]<< ; cout<<endl; } //显示vector容器中的元素void put_vector(IntVector v,char *name) {IntVector::iterator theIterator; cout<<name<<: ;for(theIterator=();theIterator!=();++theIterator){ cout<<(*theIterator)<< ;}cout<<endl; } //产生指定范围的整数随机数int getrand(int min,int max) { int m;m=(max-min);m=min+double(rand())/RAND_MAX*m ; return m; } //在main()函数中测试sort()和partial_sort()算法void main () {int i;//--------------------------------------------// sort()和partial_sort()算法对普通数组处理//---------------------------------------------//sort()算法处理数组,并显示int x[ARRAY_SIZE];for (i=0;i<ARRAY_SIZE;i++) { x[i]=getrand(1,20); }潣瑵?硜嵛尺※put_array(x,ARRAY_SIZE); sort(x,x+ARRAY_SIZE);cout<<sort(x,x+ARRAY_SIZE):<<endl; put_array(x,ARRAY_SIZE);//partial_sort()算法对于数组进行处理int y[ARRAY_SIZE];for (i=0;i<ARRAY_SIZE;i++) { y[i]=getrand(1,30) ; }cout<<y[]:;put_array(y,ARRAY_SIZE);partial_sort(y+2,y+7,y+ARRAY_SIZE);cout<<partial_sort(y+2,y+7,y+ARRAY_SIZE):<<endl;put_array(y,ARRAY_SIZE); //--------------------------------------------// sort()和partial_sort()算法对vector容器的处理//---------------------------------------------IntVector Numbers1,Numbers2;for(i=0;i<15;i++) { (getrand(1,30)); (getrand(1,30)); }put_vector(Numbers1,Numbers1); put_vector(Numbers2,Numbers2); //sort()算法处理并显示sort(),()); cout<<After call sort():<<endl;put_vector(Numbers1,Numbers1); //partial_sort()算法处理并显示partial_sort()+2,()+7,());cout<<After call partial_sort():<<endl; put_vector(Numbers2,Numbers2); } #include <iostream> #include <algorithm> #include <> #include <> #define ARRAY_SIZE 15 using namespace std; //显示数组void put_array(int x[],int size) { for(int i=0;i<size;i++) cout<<x[i]<< ; cout<<endl; } //产生指定范围的整数随机数int getrand(int min,int max) { int m; m=(max-min);m=min+double(rand())/RAND_MAX*m ; return m; }//在main()函数中测试max_element()和min_element()算法void main () { //声明变量和数组int i;int x[ARRAY_SIZE]; //用1到100的随机数初始化数组,并显示srand( (unsigned)time( NULL ) ); for (i=0;i<ARRAY_SIZE;i++){ x[i]=getrand(1,100); }潣瑵?硜嵛尺※put_array(x,ARRAY_SIZE); //对数组x使用max_element()算法,并显示int *pMax=max_element(x,x+ARRAY_SIZE); cout<<pMax=<<pMax<<endl; cout<<Location=<<(pMax-x)<<endl; cout<<*pMax=<<(*pMax)<<endl; //对数组x使用min_element()算法,并显示int *pMin=min_element(x,x+ARRAY_SIZE); cout<<pMin =<<pMin<<endl; cout<<Location=<<(pMin-x)<<endl; cout<<*pMin =<<(*pMin)<<endl; }。

c语言经典编程实例

c语言经典编程实例

c语言经典编程实例C语言作为一门经典的编程语言,拥有丰富的编程实例。

下面列举了十个经典的C语言编程实例。

1. 计算两个数的和这是一个非常简单的C语言编程实例,通过输入两个数,然后计算它们的和并输出。

可以使用scanf函数获取输入的两个数,然后使用加法运算符将它们相加,最后使用printf函数将结果输出。

2. 判断一个数是否为素数素数是指只能被1和自身整除的数。

这个实例可以通过循环判断给定的数是否能被2到它自身减1之间的数整除,如果能被整除,则不是素数,否则是素数。

3. 实现冒泡排序算法冒泡排序是一种简单的排序算法,通过比较相邻的两个元素并交换位置来实现排序。

可以通过循环嵌套和条件判断来实现冒泡排序算法。

4. 计算斐波那契数列斐波那契数列是一个经典的数列,每个数字都是前两个数字之和。

可以使用循环或递归的方式来计算斐波那契数列。

5. 判断一个字符串是否为回文字符串回文字符串是指正序和倒序读都相同的字符串。

可以通过比较字符串的首尾字符来判断是否为回文字符串。

6. 实现链表数据结构链表是一种常见的数据结构,可以通过指针来实现链表的创建、插入和删除操作。

7. 实现二叉树数据结构二叉树是一种常见的数据结构,可以通过指针来实现二叉树的创建、插入和删除操作。

8. 实现图数据结构图是一种常见的数据结构,可以通过邻接矩阵或邻接表来实现图的创建、添加和删除节点以及节点之间的连接关系。

9. 实现简单的计算器计算器是一个常见的应用程序,可以通过使用表达式解析和运算符优先级来实现一个简单的计算器。

10. 实现简单的画图程序画图程序可以通过使用图形库或者字符绘制来实现简单的图形绘制,如画直线、矩形、圆形等。

以上是十个经典的C语言编程实例,涵盖了基本的算术运算、数据结构和常见的应用程序。

通过学习和实践这些实例,可以提高对C语言的理解和应用能力。

C程序设计编程实例大全

C程序设计编程实例大全
}
/* Note:Your choice is C IDE */
#include <iostream.h>
void main()
{
int i=0,&l=i,&k=l;
i=++l-k;
cout<<"i="<<i<<endl;
}
/* Note:Your choice is C IDE */
#include <iostream.h>
int n;
cin>>n;
student wang;
wang.no=n;
cin>>wang.math;
cout<<wang.no<<" "<<wang.math<<endl;
}
#include "iostream"
using namespace std;
void main()
{
int *p;
int n;
p[i]=i*2;
cout<<"Now output the array: "<<endl;
for(i=0;i<n;i++)
cout<<p[i]<<" "<<endl;
delete []p;
}
#include "iostream"
using namespace std;
void main()
{
int *p;
int &level(int grade[],int size,int &tA,int &tB );

华中科技大学标准C语言程序设计及应用习题答案

华中科技大学标准C语言程序设计及应用习题答案

第二章一.选择题1.C2.B D 3。

A 4.A 5. D6。

C 7.D 8.C 9.A 10。

D 11。

B 12.D 13。

C 14.D 15.A 16。

B 17。

A 18。

B 100011 001111 二。

判断题1。

错2.错3.错4.错三。

填空题1. B 662。

n1=%d\nn2=%d\n3. 0四。

计算1(1)x|y = 0x002f(2)x^y = 0x0026(3)x&y = 0x0009;(4)~x+~y = 0xffc6(5)x<〈=3 0x0068(6)y〉〉=4 0x00022(1) 6(2)50(3) 1(4)–16(5) 1(6)203(1)0(2) 1(3) 1(4) 4(5)8(6) 14(1)12(2)0(3) 1(4)27(6) 6(7)24(8)27(9)–295(1)0(2) 1(3) 1(4)–3(5) 2五.程序分析题程序1b=20 a=3600程序2第三章一.填空题1.s=62.963。

(1)scanf(”%c",&c);(2) c-32 更好的答案:c-(’a’-’A’)2。

1main(){int a,b;printf(”please input a &b:");scanf("%d%d”,&a,&b);printf(”\nmax is %d\n",(a>b)?a:b);}2.2int max(int x,int y);main(){int a,b,c,max;printf(”please input a &b & c:”);scanf("%d%d%d",&a,&b,&c);max=a〉b?a:b;max=c〉max?c:max;printf("\nmax is %d\n”,max);}2.3{int i=0,sum=0;while(i〈=100){sum+=i;i++;}printf("1+2+3+.。

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