实验三 循环结构程序设计

#include"stdio.h"
int main(){
    int a,i;
    for(a = 22,i = 0;a <= 1002;a = a+20){
        i = i+a;
    }
    printf("%d\n",i);
    return 0;
}

#include"stdio.h"
int main(){
    int a,i;
    a = 22;
    i = 0;
    while(a<=1002){
    i = a+i;
    a = a+20;
    }
    printf("%d\n",i);
    return 0;
}

#include"stdio.h"
int main(){
    int a,i;
    a = 22;
    i = 0;
    do{
    i = a+i;
    a = a + 20;
    }while(a<=1002);
    printf("%d\n",i);
    return 0;

}

#include"stdio.h"
int main(){
    int a,b,c;
    int shuzi,jishu;
    for(shuzi = 100,jishu = 0;shuzi<=999;shuzi++){
    c = shuzi%10; 
    a = (shuzi - (shuzi%100))/100;
    b = ((shuzi%100)-c)/10;
    if(a*a*a+b*b*b+c*c*c == shuzi){
        printf("%d是水仙花数\n",shuzi);
        jishu++;
    }}
    printf("一共有%d个水仙花数",jishu);
    return 0;

#include"stdio.h"
int main(){
    int i,j,k,n;
    n = 0;
    for(i = 1;i<=5;i++){
        for(j = 1;j<=5;j++){
            for(k = 1;k<=5;k++){
                if(i!=j&&j!=k&&i!=k){
                    printf("%d%d%d   ",i,j,k);
                    n++;
                    if(n%5==0){
                    printf("\n");
                    }
                }
            }
        }
    }
    printf("一共有%d种组合\n",n);
    return 0;
}