题解 | #判断一个数是不是质数#

#include <iostream>
using namespace std;

int main() {

    int n;
    cin >> n;

    for (int i = 2; i <= n; i++) {
        if (n == i) {
            cout << "是质数" << endl;
        } else if (n % i == 0) {
            cout << "不是质数" << endl;
            break;
        }
    }


    return 0;
}