C++学习（二）：输出1-9的阶乘

#include<stdio.h>
#include<iostream>
int main()
{
    for (int i = 1; i <= 9; i++){
        long k = 1;
        for (int j = 1; j <= i; j++){
            k *= j;
        }
        printf("%d!的结果是:%d\n", i, k);
    }
    system("pause");
    return 0;
}