#include<iostream>
using namespace std;
int main()
{
	int i,j=2;
	cout << "請輸入要判斷的數字";
	cin >> i;
	if(i>=2)
	{do{j++;
		bool ck=0;
		if (i%j==0)
		{ck=1;
		}
		if (ck==0)
		{
			cout << "是質數" <<endl;
		}
	}

 while(j<i);}
	else
	{cout << "是質數" <<endl;
	}
	system("pause");
	return 0;
}