编辑代码

#include <stdio.h>
int main () {
    int s=0,i;
    for(i=1;i<=100;i++){
        s+=i;
    }
    printf("\n%d",s);

    i=1,s=0;
    while(i<=100){
        s+=i;
        i++;
    }
    printf("\n%d",s);

    i=1,s=0;
    do{
        s+=i;
        i++;
    }while(i<=100);
    printf("\n%d",s);
    return 0;
}