剪刀石头布游戏的难度

Question

我正在用 Java 编写一个代码，这是一个石头剪刀布游戏。特别是，我试图将随机输出（即用户输了、赢了或平局）计入分数。

例如，用户输入石头、布或剪刀。如果他们选择摇滚，他们将得到一个随机输出，决定他们是否获胜、失败或平局。如果他们得到输出，我们可以说：“你选择了石头。我选择了纸。你输了！”我想将该分数结果添加为“1 负”。在我的 while 循环中。但是，我不知道如何让程序像这样计算随机输出。

我的代码如下，我在其中添加了注释，以尝试更好地解释我想要做什么。

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

public class rockpaperscissors {

public static void main(String[] args) {

Scanner input = new Scanner(System.in);

while(true){

    System.out.println("Please choose (r)ock, (p)aper or (s)cissors:");
    String answer = input.nextLine();
    int win = 0;
    int lose = 0;
    int tie = 0;
    
    if(answer.equals("r")) {
        String[] str = { "You chose rock. I chose paper. You lose!", /* lose++; */ "You chose rock. I chose scissors. You win!",  /* win++; */ "You chose rock. I chose rock. We tie!"  /* tie++; */ };
        Random r = new Random();
        System.out.println(str[r.nextInt(3)]);
        
        
     
    }
    if(answer.equals("p")) {
        String[] str = { "You chose paper. I chose scissors. You lose!",  /* lose++; */ "You chose paper. I chose rock. You win!",  /* win++; */ "You chose paper. I chose paper. We tie!"  /* tie++; */ };
        Random r = new Random();
        System.out.println(str[r.nextInt(3)]);
   
  }
    if(answer.equals("s")) {
        String[] str = { "You chose scissors. I chose rock. You lose!",  /* lose++; */ "You chose scissors. I chose paper. You win!",  /* win++; */ "You chose scissors. I chose scissors. We tie!"  /* tie++; */ };
        Random r = new Random();
        System.out.println(str[r.nextInt(3)]);
   
  }
  
    
    System.out.println("Score: " + win + " win(s), " + lose + " loss(es), " + tie + " tie(s)");
  System.out.println("Play again (y/n)?"); 
   String c = input.nextLine();

   if(c.equalsIgnoreCase("n")){ 
      break;
     }

}

}
}

我尝试过使用 switch 语句，但没有成功。我也一直在尝试使用 if 语句，但我的代码从来没有工作过。请注意，我对 java 还很陌生，所以有些功能我很不熟悉。

Answer 1

您需要在循环外部使用变量，因为每次循环时循环内部的变量都会重置

示例代码

public static void main(String[] args) {

    Scanner input = new Scanner(System.in);
    int win = 0;
    int lose = 0;
    int tie = 0;
    while(true){

        System.out.println("Please choose (r)ock, (p)aper or (s)cissors:");
        String answer = input.nextLine();

        if(answer.equals("r")) {
            String[] str = { "You chose rock. I chose paper. You lose!", /* lose++; */ "You chose rock. I chose scissors. You win!",  /* win++; */ "You chose rock. I chose rock. We tie!"  /* tie++; */ };
            Random r = new Random();
            int i = r.nextInt(3);

            if( i == 0 ) ++lose;
            if( i == 1 ) ++win;
            if( i == 2 ) ++tie;
            System.out.println(str[i]);



        }
        if(answer.equals("p")) {
            String[] str = { "You chose paper. I chose scissors. You lose!",  /* lose++; */ "You chose paper. I chose rock. You win!",  /* win++; */ "You chose paper. I chose paper. We tie!"  /* tie++; */ };
            Random r = new Random();
            int i = r.nextInt(3);

            if( i == 0 ) ++lose;
            if( i == 1 ) ++win;
            if( i == 2 ) ++tie;
            System.out.println(str[i]);

        }
        if(answer.equals("s")) {
            String[] str = { "You chose scissors. I chose rock. You lose!",  /* lose++; */ "You chose scissors. I chose paper. You win!",  /* win++; */ "You chose scissors. I chose scissors. We tie!"  /* tie++; */ };
            Random r = new Random();
            int i = r.nextInt(3);

            if( i == 0 ) ++lose;
            if( i == 1 ) ++win;
            if( i == 2 ) ++tie;
            System.out.println(str[i]);

        }


        System.out.println("Score: " + win + " win(s), " + lose + " loss(es), " + tie + " tie(s)");
        System.out.println("Play again (y/n)?");
        String c = input.nextLine();

        if(c.equalsIgnoreCase("n")){
            break;
        }

    }

}