#include<
stdio.h>
//求阶乘
int JC(int n){
if (n == 0 || n == 1)
return 1;
else
return n*JC(n - 1);
}
int main(){
int n;
printf("求1!+2!+...+n!的结果\n输入n的值: ");
scanf("%d", &n);
int sum = 0;
for (int i = 1; i <= n; i++){
sum += JC(i);
}
printf("结果为: %d\n", sum);
return 0;
}