factorial，阶乘

#include <iostream>
using namespace std;
const int ArSize = 16;

int main()
{
    double factorial[ArSize];
	//初始化0，1的阶乘
	factorial[1] = factorial[0] = 1;
	//初始化迭代循环
	int i;
	//计算迭代结果
	for (i = 2;i < ArSize;i++)
	{
		factorial[i] = factorial[i-1]*i;
	}
	//输出迭代结果
	for (i = 0;i< ArSize;i++)
	{
		cout<<i<<"! = "<<factorial[i]<<endl;
	}
	system("pause");
	return 0;
    }