Question

我的RPS程序很好。我还在尝试了解while循环，我不知道如何处理我的游戏。一切正常，直到我对＃34;是或否＆＃34;当它问我是否想再玩一次。如果我说是的话，它会重新开始游戏，但是当我在之前的无效答案之后被提示再次尝试时我说不，它会再次播放，好像我说的是。我对此很陌生，因为生病而没有上过课。我该如何解决这个问题？我希望它能够回到原来的结果＃34;是＆＃34;和＆＃34;不＆＃34;第一个剪辑是我的问题，第二个是代码本身：

Would you like to play again? (yes or no)
nah
Error! Invalid response. Try again:
no
Welcome to the Rock - Paper - Scissors Game!

Please enter your selection (Rock, Paper, or Scissors): 



Scanner scan = new Scanner(System.in);
   Random generator = new Random();
   String computerChoice;
   String user;
   String playerChoice;
   boolean keepPlaying = true;
   int playerWins = 0;
   int playerTies = 0;
   int playerLosses = 0;
   int roundTotal = 0;
   int computer;
   while (keepPlaying == true) {
   System.out.println("Welcome to the Rock - Paper - Scissors Game!");
   System.out.println();
   System.out.println("Please enter your selection (Rock, Paper, or Scissors): ");
   playerChoice = scan.next();
   playerChoice = playerChoice.substring(0,1).toUpperCase()+ playerChoice.substring(1).toLowerCase();
   computer = generator.nextInt(3)+1;
   if(computer == 1) 
   {
       computerChoice = "Rock"; 
   }
    else if(computer == 2) 
   {
       computerChoice = "Paper"; 
   }
    else if (computer == 3) 
   {
       computerChoice = "Scissors";
   }
    else
    {
       computerChoice = "Rock";
    }

   System.out.println("User: " +playerChoice);
   System.out.println("Comp: " +computerChoice);
   if(computer==1 && playerChoice.equalsIgnoreCase("rock"))
   {
      System.out.println("Match Outcome -> User Ties");
      roundTotal++;
      playerTies++;
   }
   else if(computer==2 && playerChoice.equalsIgnoreCase("paper"))
   {
      System.out.println("Match Outcome -> User Ties");
      roundTotal++;
      playerTies++;
   }
   else if(computer==3 && playerChoice.equalsIgnoreCase("scissors"))
   {
      System.out.println("Match Outcome -> User Ties");
      roundTotal++;
      playerTies++;
   }
   else if(computer==1 && playerChoice.equalsIgnoreCase("scissors"))
   {
      System.out.println("Match Outcome -> User Loses");
      roundTotal++;
      playerLosses++;
   }
   else if(computer==1 && playerChoice.equalsIgnoreCase("paper"))
   {
      System.out.println("Match Outcome -> User Wins");
      roundTotal++;
      playerWins++;
   }
   else if(computer==2 && playerChoice.equalsIgnoreCase("rock"))
   {
      System.out.println("Match Outcome -> User Loses");
      roundTotal++;
      playerLosses++;
   }
   else if(computer==2 && playerChoice.equalsIgnoreCase("scissors"))
   {
      System.out.println("Match Outcome -> User Wins");
      roundTotal++;
      playerWins++;
   }
   else if(computer==3 && playerChoice.equalsIgnoreCase("rock"))
   {
      System.out.println("Match Outcome -> User Wins");
      roundTotal++;
      playerWins++;
   }
   else if(computer==3 && playerChoice.equalsIgnoreCase("paper"))
   {
      System.out.println("Match Outcome -> User Loses");
      roundTotal++;
      playerLosses++;
   }
   else {
      System.out.println("Error! Invalid response.");
   }
   String response = "";
   System.out.println("Would you like to play again? (yes or no)");
   response = scan.next();
   if(response.equalsIgnoreCase("no"))
   {
      keepPlaying = false;
      System.out.println("Out of " +roundTotal+ " total rounds, the user had " +playerWins+ " total wins, " +playerLosses+ " total loses, and " +playerTies+ " total ties.");
      System.out.println();
      System.out.println("Thank you for playing!");
   }
   else if(response.equalsIgnoreCase("yes"))
   {
      keepPlaying = true;
   }
   else while (!response.equalsIgnoreCase("yes") && !response.equalsIgnoreCase("no"))
   {
   System.out.println("Error! Invalid response. Try again:");
      response = scan.next();
   }
}

}
}

Answer 1

您的代码存在问题：

else while (!response.equalsIgnoreCase("yes") && !response.equalsIgnoreCase("no")) {
   System.out.println("Error! Invalid response. Try again:");
   response = scan.next();
}

一旦第一个回复不是＆＃34;是＆＃34;或者＆＃34; no＆＃34;，你最终会进入这个else条款。在这里，你阅读回复，直到你得到一个＆＃34;是＆＃34;或者＆＃34;不＆＃34;但是一旦你得到了有效的回复，你就不会做任何事情，所以你只需要回到主循环，开始新游戏。

您可以通过重写代码的最后一部分来解决此问题：

String response = "";
System.out.println("Would you like to play again? (yes or no)");
do {
    response = scan.next();
    if (response.equalsIgnoreCase("no")) {
        keepPlaying = false;
            System.out.println("Out of " + roundTotal + " total rounds, the user had " + playerWins
                        + " total wins, " + playerLosses + " total loses, and " + playerTies + " total ties.");
        System.out.println();
        System.out.println("Thank you for playing!");
    } else {
        if (response.equalsIgnoreCase("yes")) {
            keepPlaying = true;
        } else {
            System.out.println("Error! Invalid response. Try again:");
        }
    }
} while (!response.equalsIgnoreCase("yes") && !response.equalsIgnoreCase("no"));

结束我的RPS游戏？

1 个答案: