java猜数字游戏

import java.util.Random;
import java.util.Scanner;
public class hello {
    public static void main(String[] args) {
        Random r=new Random();
        int keynum=r.nextInt(100);
        Scanner sc=new Scanner(System.in);
        while(true)
        {
            System.out.println("请输入你要输入的数字");
            int num=sc.nextInt();
            if(num>keynum)
            {
                System.out.println("用户输入的数过大");
            }
            else if(num<keynum)
            {
                System.out.println("用户输入的过小");
            }
            else
            {
                System.out.println("正确");
                break;
            }
        }
    }
}