Java 中的猜数字游戏

10 Sept 2024 | 4 分钟阅读

在 Java 中，一个数字猜谜游戏是一个基本的入门级游戏，在这个游戏中，计算机生成一个随机数，玩家在一个特定的范围内尝试猜测它。下面是对其工作原理的简要介绍。

游戏开始时，计算机会在给定的范围内（例如，1 到 100 之间）生成一个随机数。
玩家猜测下一个数字：系统要求参与者输入他们对随机数的最佳猜测。
比较以下猜测：然后，计算机将玩家的猜测与随机生成的数字进行比较。
提供输入：计算机根据比较向玩家提供反馈。它可以指示猜测是过高还是过低，或者猜测是否正确。
重复或结束：玩家会一直猜测，直到他们猜中正确的数字，此时游戏将以庆祝信息结束。

游戏规则

创建一项 Java 程序，让用户有 K 次机会正确猜测一个随机生成的数字。游戏规则如下：

如果猜测的数字大于实际数字，程序将回答说猜测的数字大于实际数字。
如果猜测的数字小于实际数字，程序将回答说猜测的数字小于实际数字。
如果猜测正确或 K 次机会都已用完，程序将以适当的消息终止。

方法

方法是使用 Math.random() 函数在 Java 中生成一个随机整数。
现在，使用循环，接受用户 K 次输入，并针对每次输入发布猜测的数字是低于还是高于实际数字。
如果在 K 次尝试内，用户猜对了数字，则报告用户获胜。
否则，发布他未能猜中，并附上实际数字。

数字猜谜游戏 Java 程序

NumberGuess.java

import java.util.Scanner;
public class NumberGuess {
    public static void playGame() {
        Scanner scanner = new Scanner(System.in);
        int secretNumber = 1 + (int)(100 * Math.random());
        int maxAttempts = 5;
        int attempts, guess;
        System.out.println("Welcome to the Number Guessing Game!");
        System.out.println("A number has been chosen between 1 and 100.");
        System.out.println("Your task is to guess the number within 5 attempts.");
        for (attempts = 0; attempts < maxAttempts; attempts++) {
            System.out.println("Attempt " + (attempts + 1) + ": Enter your guess:");
            guess = scanner.nextInt();
            if (secretNumber == guess) {
                System.out.println("Congratulations! You've guessed the correct number.");
                break;
            } else if (secretNumber > guess && attempts != maxAttempts - 1) {
                System.out.println("The secret number is greater than your guess.");
            } else if (secretNumber < guess && attempts != maxAttempts - 1) {
                System.out.println("The secret number is less than your guess.");
            }
        }
        if (attempts == maxAttempts) {
            System.out.println("You have exhausted all " + maxAttempts + " attempts.");
            System.out.println("The secret number was " + secretNumber);
        }
    }
    public static void main(String args[]) {
        playGame();
    }
}

输出

Welcome to the Number Guessing Game!
A number has been chosen between 1 and 100.
Your task is to guess the number within 5 attempts.
Attempt 1: Enter your guess:
3
The secret number is greater than your guess.
Attempt 2: Enter your guess:
50
The secret number is less than your guess.
Attempt 3: Enter your guess:
30
The secret number is less than your guess.
Attempt 4: Enter your guess:
20
The secret number is greater than your guess.
Attempt 5: Enter your guess:
24
You have exhausted all 5 attempts.
The secret number was 29

让我们来看另一种相同的方法。

NumberGuess.java

import java.util.Scanner;
import java.lang.Math;
public class NumberGuess{
  public static void main(String[] args) {
    int secretNumber = (int)(Math.random() * 100) + 1;
    int remainingAttempts = 5;
    Scanner userInput = new Scanner(System.in);
    boolean isGuessed = false;
    System.out.println("I'm thinking of a number between 1 and 100.");
    System.out.println("You have 5 attempts to guess the number.");
    while (remainingAttempts > 0) {
      System.out.println("Enter your guess: ");
      int userGuess = userInput.nextInt();
      if (userGuess == secretNumber) {
        System.out.println("Congratulations! You've guessed the number. You win!");
        isGuessed = true;
        break;
      } else if (userGuess > secretNumber) {
        System.out.println("Your guess is too high. You have " + (remainingAttempts - 1) + " attempts left.");
      } else {
        System.out.println("Your guess is too low. You have " + (remainingAttempts - 1) + " attempts left.");
      }
      remainingAttempts--;
    }
    if (!isGuessed) {
      System.out.println("You've run out of attempts. You lose!");
    }
  }
}

输出

I'm thinking of a number between 1 and 100.
You have 5 attempts to guess the number.
Enter your guess: 
5
Your guess is too low. You have 4 attempts left.
Enter your guess: 
25
Your guess is too low. You have 3 attempts left.
Enter your guess: 
50
Your guess is too low. You have 2 attempts left.
Enter your guess: 
70
Your guess is too low. You have 1 attempts left.
Enter your guess: 
90
Your guess is too high. You have 0 attempts left.
You've run out of attempts. You lose!

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Java 中的猜数字游戏

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