Question

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


public class HiLo {

/**
 * Nick Jones
 * 2/10/2015
 * High or Low
 */
public static boolean high()   {
    int x;
    boolean answer;

    Random randomGenerator = new Random();
    x = randomGenerator.nextInt(9 - 1) + 1;
    System.out.println("number is " + x);

if (x > 6 && x < 14) {
    System.out.println("You win!");
    answer = true;
    return answer;
} else {
    System.out.println("You lose!");
    answer = false;
    return answer;
}
}


public static boolean low()   {
    int x;
    boolean answer;

    Random randomGenerator = new Random();
    x = randomGenerator.nextInt(9 - 1) + 1;
    System.out.println("number is " + x);

    if (x > 0 && x < 7) {
        System.out.println("You win!");
        answer = true;
        return answer;
    } else {
        System.out.println("You lose!");
        answer = false;
        return answer;
    }
    }


public static void main(String[] args) {
    int points = 1000;
    int risk;
    int guess;
    boolean answer;
    int again;

    do {
    System.out.println("you have " + points + " points.");
    Scanner input = new Scanner (System.in);

    System.out.println ("Input number of points to risk:  ");
    risk = input.nextInt();
    System.out.println ("predict <1-high, 0-low>:  ");
    guess = input.nextInt();

    if (guess == 1) {
        answer = high();
    } if (guess == 0) {
        answer = low();
    }

    if (answer = true) {
        points = points + (risk*2);
    **} if (answer = false) {
        points = points - risk;**
    }
    System.out.println("You have " + points + " points.");

    System.out.println("play again?<yes-1, no-0>  ");
    again = input.nextInt();

    } while (again == 1);





}

}

这个程序的目的是从得分为1000分的玩家开始，然后随机生成一个数字，然后他们选择他们的分数为“风险”，然后选择高或低（低 - 1-6。高 - 8-13）如果他们的猜测是正确的，他们的风险会加倍并加回到他们的分数中。如果不正确则从分数中减去风险。我的布尔语句似乎是从

停止程序

if (answer = false) {
    points = points - risk;

这一部分，所以我的布尔永远不会返回false是我认为我的问题。因为当它运行时它只允许玩家获胜，永远不会输，它会输出“你输了”，但仍然加上积分，好像他们已经赢了。

Answer 1

您正在使用分配运算符=，因此answer始终为true。相等的比较运算符是==，因为您已在代码中的其他位置使用过。但answer已经是一个布尔值。无需使用==进行比较;只是使用它。变化

if (answer = true) {
    points = points + (risk*2);
} if (answer = false) {
    points = points - risk;
}

到

if (answer) {
    points = points + (risk*2);
} else {
    points = points - risk;
}

boolean不会返回false

1 个答案: