#include #include int fact(int n){if (n == 0)return 1;elsereturn n * fact(n - 1);}int main(){int i, n;long result = 0;printf("输入你想计算的n!的前n项和的n值:");scanf("%d", &n);for (i = 0; i void main()fact(int j){int a;for(a=1;a<j;a++){sum+=sum;}}{printf("please input a number");scanf("%d",&i);fact(i);}宿舍熄灯了，明天给你答。不好意思...
