Question

所以，当我运行这个时，我得输入值，但在输入值后，它不会执行switch语句来告诉我谁获胜。我尚未提出所有案例，但我想测试它并没有发生任何事情。我已经分配了一个随机值，但是没有工作，所以我只是把它作为人工输入。我最终必须把它放在人类正在玩电脑的地方。

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

public class rock{

    public static void main(String[] args) {
        int x;
        int y;
        Random randomGenerator = new Random();
         Scanner input= new Scanner(System.in);

        System.out.print("Human player: Enter 0 for rock, 1 for scissors, 2 for paper, 3 for lizard, 4 for spock:");
        x=input.nextInt();
        System.out.print("Computer player: Enter 0 for rock, 1 for scissors, 2 for paper, 3 for lizard, 4 for spock:");
        y = input.nextInt();

         switch(x)
            {
                case '0':
                    switch (y)
                    {
                        case '1':
                            System.out.print("Human Wins computer chose scissors!");
                            break;
                        case '2':
                            System.out.println("Human wins computer chose paper!");
                            break;
                        case '0':
                            System.out.println("Draw!");
                            break;
                        case '3':
                            System.out.println("Human Wins with Lizard!");
                            break;
                        case '4':
                            System.out.println("Computer Wins with Spock!");
                            break;
                    }
            }
            switch (x)
            {
                case '1':
                    switch(y)
                    {
                    case '1':
                        System.out.print("Human Wins computer chose scissors!");
                        break;
                    case '2':
                        System.out.println("Human wins computer chose paper!");
                        break;
                    case '0':
                        System.out.println("Draw!");
                        break;
                    case '3':
                        System.out.println("Human Wins with Lizard!");
                        break;
                    case '4':
                        System.out.println("Computer Wins with Spock!");
                        break;
                    }
            }
            switch (x)
            {
                case '2':
                    switch (y)
                    {
                    case '1':
                        System.out.print("Human Wins computer chose scissors!");
                        break;
                    case '2':
                        System.out.println("Human wins computer chose paper!");
                        break;
                    case '0':
                        System.out.println("Draw!");
                        break;
                    case '3':
                        System.out.println("Human Wins with Lizard!");
                        break;
                    case '4':
                        System.out.println("Computer Wins with Spock!");
                        break;
                    }
            }
        }

    }

Answer 1

经过一些更正后工作： - 1）您不需要多次使用switch（x）。 2）x和y是int，因此case语句应该类似于case 1而不是case'1'

public class Rock {

    public static void main(String[] args) {
        int x;
        int y;
        Random randomGenerator = new Random();
         Scanner input= new Scanner(System.in);

        System.out.print("Human player: Enter 0 for rock, 1 for scissors, 2 for paper, 3 for lizard, 4 for spock:");
        x=input.nextInt();
        System.out.print("Computer player: Enter 0 for rock, 1 for scissors, 2 for paper, 3 for lizard, 4 for spock:");
        y = input.nextInt();

         switch(x)
            {
                case 0:
                    switch (y)
                    {
                        case 1:
                            System.out.print("Human Wins computer chose scissors!");
                            break;
                        case 2:
                            System.out.println("Human wins computer chose paper!");
                            break;
                        case 0:
                            System.out.println("Draw!");
                            break;
                        case 3:
                            System.out.println("Human Wins with Lizard!");
                            break;
                        case 4:
                            System.out.println("Computer Wins with Spock!");
                            break;
                    }

            case 1:
                    switch(y)
                    {
                    case 1:
                        System.out.print("Human Wins computer chose scissors!");
                        break;
                    case 2:
                        System.out.println("Human wins computer chose paper!");
                        break;
                    case 0:
                        System.out.println("Draw!");
                        break;
                    case 3:
                        System.out.println("Human Wins with Lizard!");
                        break;
                    case 4:
                        System.out.println("Computer Wins with Spock!");
                        break;
                    }

            case 2:
                    switch (y)
                    {
                    case 1:
                        System.out.print("Human Wins computer chose scissors!");
                        break;
                    case 2:
                        System.out.println("Human wins computer chose paper!");
                        break;
                    case 0:
                        System.out.println("Draw!");
                        break;
                    case 3:
                        System.out.println("Human Wins with Lizard!");
                        break;
                    case 4:
                        System.out.println("Computer Wins with Spock!");
                        break;
                    }

        }

    }
}

Answer 2

您使用的是字符，而不是数字。

当你这样做时

case '1': // uses a character, which has an ascii (thus integer) value of 49

与此类似int x = 1; // integer value of 1

case 1: // uses an integer with value of 1

char可以自动投射到int，这就是这里发生的事情。在{{1}一种类型和switch在另一种类型上发出警告似乎很方便，但是c＆＃39; est la vie。

岩石剪刀蜥蜴Spock游戏不工作

2 个答案: