求整数n>0的阶乘和 C语言

 

#include <stdio.h>

int main() {
    int n = 0;
    
    while(scanf("%lld", &n) && n > 0) {
        
        long long sum = 0;
        
        for(int i = 1; i <= n; i++) {
            long long factorial = 1;
            for (int j = 1; j <= i; j++) {
                factorial *= j;
            }
            sum += factorial;
        }
        printf("%lld的阶乘和为:%lld\n", n, sum);
    }
    
    return 0;
}