一，教材上的代码:

import java.util.Scanner;
import java.util.Random;
public class GuessNumber{
    public static void main(String args[]){
        Scanner reader = new Scanner(System.in);
        Random random=new Random();
        System.out.println("给你一个1至100之间的整数,请猜测这个数:");
        int realNumber=random.nextInt(100)+1;//random.nextInt(100)是[0,100)中的随机整数
        int yourGuess=0;
        System.out.print("请输入你的猜测:");
        yourGuess=reader.nextInt();
        while(yourGuess != realNumber)//循环条件
        {
            if(yourGuess>realNumber)//猜大了的条件代码
            {
   System.out.print("猜大了,再输入你的猜测:");
   yourGuess=reader.nextInt();
            }
            else if (yourGuess<realNumber)//猜小了的条件代码
            {
   System.out.print("猜小了，再输入你的代码:");
   yourGuess=reader.nextInt();
            }
        }
        System.out.print("猜对了！");
    }
}

运行的效果截图:

二，优化用户体验代码(提示区间,运气值判定):

import java.util.Scanner;
import java.util.Random;
public class GuessNumberS{
    public static void main(String args[]){
        Scanner reader = new Scanner(System.in);
        Random random=new Random();
        System.out.println("给你一个1至100之间的整数,请猜测这个数:[1,100]");
        int realNumber=random.nextInt(100)+1;//random.nextInt(100)是[0,100)中的随机整数
        int yourGuess=0,count=0;
        int high=100,low=1;
        System.out.print("请输入你的猜测:");
        yourGuess=reader.nextInt();
        count++;
        while(yourGuess != realNumber)//循环条件
        {
            if(yourGuess>realNumber)//猜大了的条件代码
            {
   high=yourGuess;
   System.out.println("猜大了,再输入你的猜测["+low+","+high+"]");
   yourGuess=reader.nextInt();
   count++;
            }
            else if (yourGuess<realNumber)//猜小了的条件代码
            {
   low=yourGuess;
   System.out.println("猜小了，再输入你的猜测["+low+","+high+"]");
   yourGuess=reader.nextInt();
   count++;
            }
        }
        switch(count){
            case 1:    System.out.print("你一下就猜到了，你一定是天选之人！");    break;
        }
        if(count>1 &amp;&amp; count<=5){
            System.out.print("你只猜了"+count+"次就猜对啦！！！你的运气太好啦！");
        }else if(count>5 &amp;&amp; count<=8){
            System.out.print("你一共猜了"+count+"次！！也很棒呦~");
        }else if(count>8 &amp;&amp; count<=10000){
            System.out.print("你一共猜了"+count+"次！");
        }
    }
}

运行的效果截图:

原文地址：https://blog.csdn.net/weixin_62650212/article/details/123805693?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522168474995516800188548878%2522%252C%2522scm%2522%253A%252220140713.130102334.pc%255Fall.%2522%257D&request_id=168474995516800188548878&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~all~first_rank_ecpm_v1~rank_v31_ecpm-8-123805693-null-null.142^v87^control_2,239^v2^insert_chatgpt&utm_term=java%E4%BC%98%E5%8C%96