#include <iostream>
#include <cstdlib>
#include <cstdio>
using namespace std;
int main()//素性测试
{
	int a, b, d, c;
	a = 1;
	while (a!=0)//当你输入0时，循环停止。
	{
		c = 0;
		cout << "请输入您要测试的素数" << endl;
		cin >> a;
		for (int i = 1; i <= a; i++)
		{
			b = a%i;
			if (b == 0)
			{

				c += 1;
			}
			d = c;
			if (c>2)
			{
				cout << "不是素数" << endl;
				break;
			}
		}
		if (d == 2)
		{
			cout << "是素数" << endl;
		}
		system("pause");
		system("cls");
	}
	system("pause");
	return 0;
}