C++ 求阶乘

1#include<iostream>
2using namespace std;
3const int size = 6; //输入阶乘数
4int main()
5{   
6    long long factorial[size];
7    factorial[1] = factorial[0] = 1LL;
8    for (int i = 2; i < size; i++)
9    {
10        factorial[i] = i * factorial[i - 1];
11    }
12    for (int i = 0; i < size; i++)
13        cout << i << "! = " << factorial[i] << endl;
14    cin.get();
15    return 0;
16}

输出：

10! = 1
21! = 1
32! = 2
43! = 6
54! = 24
65! = 120