import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("请输入一个整数");
int number = sc.nextInt();
boolean flag = true; //ture:是质数。false:不是质数
for (int i = 2; i <= number-1; i++) {
if (number % i == 0 || number == 1) {
flag = false;
}
}
if(flag){
System.out.println(number + "是质数");
} else {
System.out.println(number + "不是质数");
}
}
}
哪里有问题?谢谢大家指正!