java While-loop语句将继续循环但不会包含我退出循环的语句

Question

程序本身可以工作，但我在循环中遇到了困难。我是使用循环的初学者，我一直在寻找适用于我的程序类型的示例，但遗憾的是没有找到任何示例。

我知道如果体内有某些东西可以使条件为“假”，循环就会停止，但对于这个程序来说，当它询问用户是否想再次播放时就会决定。但是，我的程序不会询问用户是否要继续。如果用户决定停止，那么程序应该说“感谢您玩!”而不是继续循环整个主体。

感谢您的帮助!

这是我的循环:

// Start loop
while (looping == true) {

    // Ask if the # > 5
    System.out.println("Is your number greater than 5? (True = 1, False = 0)");
    // Read in the number
    numberOne = input.nextDouble();

    if (numberOne == 1) { // Is the # > 7?
        System.out.println("Is your number greater than 7? (True = 1, False = 0)");
        numberOne = input.nextDouble();

        if (numberOne == 1) { // Does the # = 8?
            System.out.println("Is your number 8? (True = 1, False = 0)");
            numberOne = input.nextDouble();

            if (numberOne == 0) { // If # != 8, then # = 9
                System.out.println("Your number is 9!");
            } else {
                // If answer was 8, then yay
                System.out.println("Yay! Got it!");
            }
        } else if (numberOne == 0) { // If # !> 7, then # = 6?
            System.out.println("Is your number 6? (True = 1, False = 0)");
            numberOne = input.nextDouble();

            if (numberOne == 0) { // If # != 6, then # = 7
                System.out.println("Your number is 7!");
            } else {
                //If answer was 6, then yay
                System.out.println("Yay! Got it!");
            }
        }

    } else if (numberOne == 0) { // If the # !> 5, then # > 3?
        System.out.println("Is your number greater than 3? (True = 1, False = 0)");
        numberOne = input.nextDouble();

        if (numberOne == 1) { // If true, does your number = 4?
            System.out.println("Is your number 4? (True = 1, False = 0)");
            numberOne = input.nextDouble();

            if (numberOne == 0) { // If # != 4, then # = 5
                System.out.println("Your number is 5!");
            } else {
                // If answer was 4, then yay
                System.out.println("Yay! Got it!");
            }
        } else if (numberOne == 0) { // If false, # = 2?
            System.out.println("Is your number 2? (True = 1, False = 0)");
            numberOne = input.nextDouble();

            if (numberOne == 0) { // If # != 2, then # = 3
                System.out.println("Your number is 3!");
            } else {
                // If answer is 2, then yay
                System.out.println("Yay! Got it!");
            }

            // Ask user if they want to play again
            System.out.println("Would you like to play again? (Yes = 1, No = 0)");
            numberOne = input.nextDouble();

            System.out.println("Thanks for playing!");
        }
    }
} // end loop
// Close input
input.close();
} // end method
} // end class

Answer 1

因为您没有更改循环变量值。并将下面的代码移到 else if() block 之外。

...
System.out.println("Would you like to play again? (Yes = 1, No = 0)");
looping = input.nextBoolean();

if (looping == false) {
    System.out.println("Thanks for playing!");
}
...

<小时/>

您的代码将如下所示

// Start loop
while (looping == true) {

    // Ask if the # > 5
    System.out.println("Is your number greater than 5? (True = 1, False = 0)");
    // Read in the number
    numberOne = input.nextDouble();

    if (numberOne == 1) { // Is the # > 7?
        System.out.println("Is your number greater than 7? (True = 1, False = 0)");
        numberOne = input.nextDouble();

        if (numberOne == 1) { // Does the # = 8?
            System.out.println("Is your number 8? (True = 1, False = 0)");
            numberOne = input.nextDouble();

            if (numberOne == 0) { // If # != 8, then # = 9
                System.out.println("Your number is 9!");
            } else {
                // If answer was 8, then yay
                System.out.println("Yay! Got it!");
            }
        } else if (numberOne == 0) { // If # !> 7, then # = 6?
            System.out.println("Is your number 6? (True = 1, False = 0)");
            numberOne = input.nextDouble();

            if (numberOne == 0) { // If # != 6, then # = 7
                System.out.println("Your number is 7!");
            } else {
                //If answer was 6, then yay
                System.out.println("Yay! Got it!");
            }
        }

    } else if (numberOne == 0) { // If the # !> 5, then # > 3?
        System.out.println("Is your number greater than 3? (True = 1, False = 0)");
        numberOne = input.nextDouble();

        if (numberOne == 1) { // If true, does your number = 4?
            System.out.println("Is your number 4? (True = 1, False = 0)");
            numberOne = input.nextDouble();

            if (numberOne == 0) { // If # != 4, then # = 5
                System.out.println("Your number is 5!");
            } else {
                // If answer was 4, then yay
                System.out.println("Yay! Got it!");
            }
        } else if (numberOne == 0) { // If false, # = 2?
            System.out.println("Is your number 2? (True = 1, False = 0)");
            numberOne = input.nextDouble();

            if (numberOne == 0) { // If # != 2, then # = 3
                System.out.println("Your number is 3!");
            } else {
                // If answer is 2, then yay
                System.out.println("Yay! Got it!");
            }
        }
    }

    // Ask user if they want to play again
    System.out.println("Would you like to play again? (Yes = 1, No = 0)");
    looping = input.nextBoolean();

    if (looping == false) {
        System.out.println("Thanks for playing!");
    }
}
// Close input
input.close();
}
}