一.介绍
程序创建一个魔法数，然后提示用户在一个循环中连续输人猜测值。对每一次猜测，程序检査该猜测数是否正确，是偏高还是偏低了。当某次猜测正确时，程序就退出这个循环。注意：guess被初始化为-1。将它初始化为0到100之间的值会出错，因为它很可能就是要猜的数。
二.代码
package com.zhuo.base.com.zhuo.base;
import java.util.Scanner;
public class GuessNumber {
public static void main(String[] args) {
//生成一个要猜测的0~100的随机数
int number = (int)(Math.random() * 101);
Scanner input = new Scanner(System.in);
System.out.println("Guess a magic number between 0 and 100");
int guess = -1;
while (guess != number) {
//提示用户猜测数字
System.out.println("\nEnter your guess: ");
guess = input.nextInt();
if (guess == number)
System.out.println("Yes,the number is " + number);
else if (guess > number)
System.out.println("Your guess is too high");
else
System.out.println("Your guess is too low");
}
}
}
三.结果显示
D:\Java\jdk1.8.0_281\bin\java.exe "-javaagent:D:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2020.3.2\lib\idea_rt.jar=51207:D:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2020.3.2\bin" -Dfile.encoding=UTF-8 -classpath D:\Java\jdk1.8.0_281\jre\lib\charsets.jar;D:\Java\jdk1.8.0_281\jre\lib\deploy.jar;D:\Java\jdk1.8.0_281\jre\lib\ext\access-bridge-64.jar;D:\Java\jdk1.8.0_281\jre\lib\ext\cldrdata.jar;D:\Java\jdk1.8.0_281\jre\lib\ext\dnsns.jar;D:\Java\jdk1.8.0_281\jre\lib\ext\jaccess.jar;D:\Java\jdk1.8.0_281\jre\lib\ext\jfxrt.jar;D:\Java\jdk1.8.0_281\jre\lib\ext\localedata.jar;D:\Java\jdk1.8.0_281\jre\lib\ext\nashorn.jar;D:\Java\jdk1.8.0_281\jre\lib\ext\sunec.jar;D:\Java\jdk1.8.0_281\jre\lib\ext\sunjce_provider.jar;D:\Java\jdk1.8.0_281\jre\lib\ext\sunmscapi.jar;D:\Java\jdk1.8.0_281\jre\lib\ext\sunpkcs11.jar;D:\Java\jdk1.8.0_281\jre\lib\ext\zipfs.jar;D:\Java\jdk1.8.0_281\jre\lib\javaws.jar;D:\Java\jdk1.8.0_281\jre\lib\jce.jar;D:\Java\jdk1.8.0_281\jre\lib\jfr.jar;D:\Java\jdk1.8.0_281\jre\lib\jfxswt.jar;D:\Java\jdk1.8.0_281\jre\lib\jsse.jar;D:\Java\jdk1.8.0_281\jre\lib\management-agent.jar;D:\Java\jdk1.8.0_281\jre\lib\plugin.jar;D:\Java\jdk1.8.0_281\jre\lib\resources.jar;D:\Java\jdk1.8.0_281\jre\lib\rt.jar;D:\IdeaProjects\JavaSE\out\production\Practise com.zhuo.base.com.zhuo.base.GuessNumber
Guess a magic number between 0 and 100
Enter your guess:
50
Your guess is too low
Enter your guess:
75
Your guess is too high
Enter your guess:
57
Your guess is too low
Enter your guess:
61
Your guess is too high
Enter your guess:
60
Yes,the number is 60
Process finished with exit code 0