Question

尝试制作我的代码，以便我可以询问用户是否想再次播放，但是我很困惑我应该如何解决这个问题。

Scanner in = new Scanner(System.in);
int randomNum = 1 + (int)(Math.random() * 100);
System.out.println(randomNum);

Boolean playAgain = true;

while (playAgain) {
    System.out.print("I'm thinking of a number between 1 and 100.\nWhat is it?\nGuess: ");      
    int guessNum = in.nextInt();

    while ((guessNum > randomNum) || (guessNum < randomNum)) {
        if (guessNum > randomNum) {
            System.out.print("Too High.\nGuess: ");
            guessNum = in.nextInt();
        } else if (guessNum < randomNum) {
            System.out.print("Too Low.\nGuess: ");
            guessNum = in.nextInt();
        }           
    } 

    System.out.println("You got it!\nPlay again? (Y/N) ");

    String answer = in.next();

    if (answer == "y") {
        playAgain = true;
    } else {
        playAgain = false;
        System.out.println("Thanks for playing!");
    }
}

Answer 1

您使用了==等于关系运算符，它通常用于检查字符串引用而不是实际值。因此，即使答案包含y，您的条件表达式也不会将true作为结果返回。

供参考：Visit Here For More Info ( '==' vs 'equals()' method)

String answer = in.next();

//problem with this line becuase == operator use to check reference instead of value
if (answer == "y") {  
    playAgain = true;
} else {
    playAgain = false;
    System.out.println("Thanks for playing!");
}

所以改变你的代码如下所示

String answer = in.next();

    if (answer.startsWith("y") || answer.startsWith("Y")) {  // Now this willl work fine to your code
        playAgain = true;
    } else {
        playAgain = false;
        System.out.println("Thanks for playing!");
    }

Answer 2

如果您想使用playAgain var，请使用

from keras.applications.resnet50 import ResNet50
import keras.layers

# this could also be the output a different Keras model or layer
input = keras.layers.Input(shape=(400, 400, 1))  # this assumes K.image_dim_ordering() == 'tf'
x1 = keras.layers.AveragePooling2D(pool_size=(2,2))(input)
x2 = keras.layers.Flatten()(x1)
x3 = keras.layers.RepeatVector(3)(x2)
x4 = keras.layers.Reshape((200, 200, 3))(x3)
x5 = keras.layers.ZeroPadding2D(padding=(12,12))(x4)
m = keras.models.Model(input, x5) 
model = ResNet50(input_tensor=m.output, weights='imagenet', include_top=False)

比较两个字符串而不是answer.equals("y")。

否则在阻止或执行时将完整代码放在内部。如果用户想要玩，那么继续，否则休息;

==

Answer 3

它可以帮助你

do {
            System.out.print("I'm thinking of a number between 1 and 100.\nWhat is it?\nGuess: ");
            int randomNum = 1 + (int) (Math.random() * 100);
            System.out.println(randomNum);

            int guessNum = in.nextInt();

            do {

                if (guessNum > randomNum) {
                    System.out.print("Too High.\nGuess: ");
                    guessNum = in.nextInt();
                } else if (guessNum < randomNum) {
                    System.out.print("Too Low.\nGuess: ");
                    guessNum = in.nextInt();
                }
            }while ((guessNum > randomNum) || (guessNum < randomNum));

                System.out.println("You got it!\nPlay again? (Y/N) ");

                answer = in.next();
        }while(answer.equals("y"));

如何使用代码末尾指定的布尔值进行代码循环？

3 个答案: