java - 猜谜游戏中的随机数

Question

我正在尝试编写一个猜数游戏程序，因此程序会生成一个随机数，并且程序会提示太高、太低，直到用户得到它的写入。然而，随机生成器要么每次生成相同的随机数，要么对于一个用户输入说“太高”，然后对紧接着/之后的用户输入说“太低”

我已将随机生成器移至 while 循环内，在这种情况下，它表示输入“太高”，而后面的数字“太低”。当我将随机生成器移到循环之外时，它只会为游戏的每次刺激生成相同的数字。

import java.util.Scanner;
import java.util.Random;

public class NumberGuessingGame {

    public static void main(String[] args) {
        int randomNumber, userNumber = 0, guesses = 0;
        final int MAX = 100;
        char playGame = 'y';

        Random generator = new Random();

        // ask user if they wish to play
        System.out.println("Would you like to play the Number Guessing y / n");
        Scanner scan = new Scanner(System.in);

        playGame = scan.next().charAt(0);

        // while loop to continue to execute game as long as the user enters 'y'
        while (playGame == 'y') {
            if (playGame != 'y')
                break;

            randomNumber = generator.nextInt(MAX) + 1;

            System.out.println("Please pick a number between 1 and 100.");
            userNumber = scan.nextInt();

            // high and low sugguestion
            if (userNumber > randomNumber)
                System.out.println("Number is too high, try something lower.");
            if (userNumber < randomNumber)
                System.out.println("Number is too low, try something higher.");
            if (userNumber == randomNumber) {
                System.out.println("That number is correct!");
                System.out.println("Would you like to play again? y/n");
                playGame = scan.next().charAt(0);
            }
            // counter to keep running total of times guessed
            guesses++;
            System.out.println("You have guessed " + guesses + " times!");

        }

        // break statement skips here when 'n' is entered in
        // the game prompting question
        System.out.println("Thanks for playing, have a nice day!");
    }
}

程序应该为游戏的每次迭代生成一个新的随机数，每次正确猜测随机数后都会提示该随机数。

Answer 1

希望这有助于您澄清问题!

目前，您的随机数生成与游戏的其余部分位于同一循环中，这就是每次您收到新提示时它都会生成新数字的原因。解决此问题的一种方法是创建两个循环。一个循环控制游戏是否继续，并在另一个循环内管理该回合。

//The loop controlling the game   
while (playGame == 'y') {
        if (playGame != 'y')
            break;

        randomNumber = generator.nextInt(MAX) + 1;
        //Creating a flag to control the inner loop
        int correct = 0;

        //The loop to control the round.
        while (correct == 0){
            System.out.println("Please pick a number between 1 and 100.");
            userNumber = scan.nextInt();

            // high and low sugguestion
            if (userNumber > randomNumber)
                System.out.println("Number is too high, try something lower.");
            if (userNumber < randomNumber)
                System.out.println("Number is too low, try something higher.");
            if (userNumber == randomNumber) {
                System.out.println("That number is correct!");
                correct = 1;
                System.out.println("Would you like to play again? y/n");
                playGame = scan.next().charAt(0);
            }            

            // counter to keep running total of times guessed
            guesses++;
            System.out.println("You have guessed " + guesses + " times!");
        }

    }    

干杯!