使用用户输入迭代 While 循环

Question

首先，感谢您阅读我的帖子并帮助我。

我正在尝试在我定义一个随机数的地方进行编程，程序猜测这个随机数，然后根据我说的猜测太高或太低，程序再次猜测。

当程序猜到一个太高的数字时，用户输入“lower”，然后程序只猜较低的数字。

理想情况下，程序会考虑所有先前选择的结果。因此，如果猜测 #1 太高，那么这应该是之后所有迭代的上限。我们不希望每次迭代都只改变上限或下限。

我尝试对我的代码执行的操作是重置用于计算随机数 (ThreadLocalRandom) 的最小值和最大值。

主要问题是我无法重置 oMin 和 oMax 值。我不明白如何解决这个问题，对不起，如果这是一个完全愚蠢的问题。

再次感谢！

import java.util.Scanner;

import java.util.concurrent.ThreadLocalRandom;

public class J4AB_S11_C3 {
    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);
        int oMin = 0;
        int oMax = 101;
        int randomNumber = ThreadLocalRandom.current().nextInt(oMin, oMax);
        String userReply;

        System.out.println("What's the lucky number, kiddo?");
        int correctAnswer = scanner.nextInt();

        System.out.println("Is " + randomNumber + " the right answer?");
        userReply = scanner.next();

        while ("Higher".equalsIgnoreCase(userReply)) {
            oMin = randomNumber;
        }

        while ("Lower".equalsIgnoreCase(userReply)) {
            oMax = randomNumber;
        }

        if (userReply.equalsIgnoreCase("Correct")) {
            System.out.println("We finally did it! " + correctAnswer + " was the correct answer.");
        }

    }
}

Answer 1

为此使用do-while，if-condition检查更高和更低。并在 do-while 之后关闭 scanner

        Scanner scanner = new Scanner(System.in);
        int oMin = 0;
        int oMax = 101;
        String userReply;
        int correctAnswer;
        do {
            int randomNumber = ThreadLocalRandom.current().nextInt(oMin, oMax);
            System.out.println("What's the lucky number, kiddo?");
            correctAnswer = scanner.nextInt();

            System.out.println("Is " + randomNumber + " the right answer?");
            userReply = scanner.next();

            if ("Higher".equalsIgnoreCase(userReply)) {
                oMin = randomNumber;
            }else if ("Lower".equalsIgnoreCase(userReply)) {
                oMax = randomNumber;
            }
        } while (!userReply.equalsIgnoreCase("Correct"));

        System.out.println("We finally did it! " + correctAnswer + " was the correct answer.");

        scanner.close();

Answer 2

我做了一些编辑并添加了一个 while 循环，请检查一下。我测试了它，它似乎工作正常。

import java.util.Scanner;

import java.util.concurrent.ThreadLocalRandom;

public class J4AB_S11_C3 {
    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);
        int oMin = 0;
        int oMax = 101;
        int randomNumber = ThreadLocalRandom.current().nextInt(oMin, oMax);
        String userReply;

        System.out.println("What's the lucky number, kiddo?");
        int correctAnswer = scanner.nextInt();

        System.out.println("Is " + randomNumber + " the right answer?");
        userReply = scanner.next();
        while (!"Correct".equalsIgnoreCase(userReply)){
        if ("Higher".equalsIgnoreCase(userReply)) {
            oMin = randomNumber;
        }

        if ("Lower".equalsIgnoreCase(userReply)) {
            oMax = randomNumber;
        }
        randomNumber = ThreadLocalRandom.current().nextInt(oMin, oMax);
        System.out.println("Is " + randomNumber + " the right answer?");
        userReply = scanner.next();
        }
        if (userReply.equalsIgnoreCase("Correct")) {
            System.out.println("We finally did it! " + correctAnswer + " was the correct answer.");
        }
    }
}