计算阶乘和

9

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