题解 | #判断一个数是不是质数#

#include <iostream>
using namespace std;

int main() {

    // write your code here......
    //printf("输入一个大于1的整数");
    int num =0;
    //scanf("%d",&num);
    cin >> num;
    if(num <= 1)
    {
        printf("不是质数");
    }
    if(num == 2){
        cout << "是质数";
    }
    else{
        for(int i = 2; i< num; i++){
            if(num % i == 0)
            {
                printf("不是质数");
                return 0;
            }           
        }
        printf("是质数");
    }
    return 0;
}