输入n并计算

1！+2！+3！+...+n!

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