Question

我的目标：创建一个程序，可以检查您猜到的数字是否正确。它会告诉你它是否太高/太低。它需要继续给你机会，直到你猜对了。此外，如果您愿意，它需要能够在您完成后从头开始恢复。

问题：我的if语句卡在无限循环中，并且尝试在最后重新启动程序根本不起作用。

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

    public class driver {
        public static void main (String [] args) {
            // Output number of guesses.

            Scanner scan = new Scanner(System.in);
            Random randomGenerator = new Random();

            int randomInt = randomGenerator.nextInt(100) + 1;

            System.out.println(randomInt);

            System.out.println("Welcome to my guessing game. What is your first guess that is between 1 and 100?");
            int userInput = scan.nextInt();

            String playAgain = "Y";
            int guesses = 0;

            System.out.println(randomInt);

            while (playAgain == "Y") {
                if (userInput > 0 && userInput < 100) {
                    if (userInput == randomInt){
                        guesses++;
                        System.out.println ("Right! Guesses: " + guesses);
                        playAgain = "f";
                    }
                    // Too low
                    else if (userInput < randomInt) {
                        guesses++;
                        System.out.println ("Your guess was too LOW.");
                    }
                    // Too high
                    else {
                        System.out.println ("Your guess was too HIGH.");
                        guesses++;
                    }
                }
            }
            // I want to be able to resume from the top if the user says Y.
            System.out.println("Would you like to play again?(Y/N)");
            playAgain = scan.next();
        }
    }

Answer 1

最后两行应该在你的while循环中，问题在于你的大括号

     while (playAgain == "Y") {
        if (userInput > 0 && userInput < 100) {
            if (userInput == randomInt){
                guesses++;
                System.out.println ("Right! Guesses: " + guesses);
                playAgain = "f";
            }

            else if (userInput < randomInt) {
                guesses++;
                System.out.println ("Your guess was too LOW.");
            }
            else {
                System.out.println ("Your guess was too HIGH.");
                guesses++;
            }
        }
    }
    System.out.println("Would you like to play again?(Y/N)");
    playAgain = scan.next();
}

底部应该如下：

                guesses++;
            }
        }
    System.out.println("Would you like to play again?(Y/N)");
    playAgain = scan.next();
    }
}

它的方式意味着while的条件永远不会更新。我假设您希望在用户的每次输入后更新它。

试图反复评估一个数字时陷入循环

1 个答案: