对我来说真的好难，希望可以有人来解答一下

Question

![img](https://img-mid.csdnimg.cn/release/static/image/mid/ask/9814209

Answer 1

供参考：

#include<stdio.h>
int main()
{
    int n,s,i,j,k;
    scanf("%d",&n);
    for(i=1,s=0;i<=n;i++)
    {
        for(j=1,k=0;j<=i;j++)
           k+=j;
        s+=k;
    }
    printf("s=%d",s);
    return 0;
}