Question

java 质数计算1、功能要求开发基于控制台的质数判断系统。具体要求如下：（1）接受输入正整数N。（2）判断N是否为质数

Answer 1

已经发送

import java.util.Scanner;

public class PrimeNumber {

public static void main(String[] args) {

System.out.println("input numbers:");

Scanner scan = new Scanner(System.in);

int num = scan.nextInt();

int flag = 1;

for (int i = 2; i < (num / 2); i++) {

if (num % i != 0) {

flag = 1;

} else {

flag = 0;

}

}

if (flag == 1) {

System.out.println(num + "是质素！！");

} else {

System.out.println(num + "不是质素！！");

}

}

}