正在修复我的循环，需要输入检查器方面的帮助，Java

Question

因此，最近我发布了一个问题，询问关于我的“高”和“低”游戏，它到处都是，只是不起作用，我在这个游戏中采取了另一种方法，它起作用了，这次只是一个小问题，显示比解释更容易。因此，这是我的代码：

String noReplay = "\nThank you for playing.";
        String highLow = "(H)igher or (L)ower: ";
        String loseHigh = "Card is higher, you lose. Would you like to play again? Y/N: ";
        String loseLow = "Card is lower, you lose. Would you like to play again? Y/N: ";

        String playAgain;

        boolean replay = false;

        Random rand = new Random();
        Scanner scan = new Scanner(System.in);

        do {

            int card1 = rand.nextInt(13) + 1; 
            int card2 = rand.nextInt(13) + 1;

            System.out.println("Card is: " + card1);
            System.out.printf(highLow);
            String guess = scan.nextLine().toUpperCase();

            if(card2 > card1 && guess.equalsIgnoreCase("H")) {
                System.out.println("Card is: " + card2);
                System.out.printf(highLow);
                replay = true;
                guess = scan.nextLine().toUpperCase();

            }
            else if(card2 > card1 && guess.equalsIgnoreCase("L")) {
                System.out.println("Card is: " + card2);
                System.out.printf(loseHigh);
                playAgain = scan.nextLine().toUpperCase();
                if(playAgain.equalsIgnoreCase("Y")) {
                    replay = true;
                }
                else if(playAgain.equalsIgnoreCase("N")) {
                    replay = false;
                    System.out.println(noReplay);
                }
            }
            else if(card2 < card1 && guess.equalsIgnoreCase("H")) {
                System.out.println("Card is: " + card2);
                System.out.printf(loseLow);
                playAgain = scan.nextLine().toUpperCase();
                if(playAgain.equalsIgnoreCase("Y")) {
                    replay = true;
                }
                if(playAgain.equalsIgnoreCase("N")) {
                    replay = false;
                    System.out.println(noReplay);
                }
            }
            else if(card2 < card1 && guess.equalsIgnoreCase("L")) {
                System.out.println("Card is: " + card2);
                System.out.printf(highLow);
                replay = true;
                guess = scan.nextLine().toUpperCase();
            }

        } while(replay != false);

我的项目的目的是创建一个简单的游戏，当用户输入上面的卡号时，程序会给出正确的答案，或者从该阶段重放游戏，或者询问用户是否愿意在失败时再次玩

这很好，但是从我的输出来看：

Card is: 9
(H)igher or (L)ower: h
Card is: 11
(H)igher or (L)ower: l
*Card is: 6*
*(H)igher or (L)ower: l*
*Card is: 7*
Card is higher, you lose. Would you like to play again? Y/N: y
*Card is: 13*
*(H)igher or (L)ower: h*
*Card is: 10*
(H)igher or (L)ower: 

我们可以在星条旗上看到，它没有做它应该做的事情。 当我说更高时，如果数字更低，它应该询问我是否愿意再次比赛，因为我搞错了。在这种情况下不是吗

这就是我的问题^

另一件事，当我在它，我想请求与输入检查器的帮助，我只希望用户能够输入Y，N，H，L（我已排序的小写或大写的问题了）

谢谢你的阅读

Answer 1

这应该是有意义的，有助于减少游戏的复杂性。看看我对card1和card2的比较，你想根据card2和card1的比较来猜测，而不是相反。如果这有道理的话。希望这有帮助

     String highLow = "(H)igher or (L)ower: ";
     String loseHigh = "Card is higher, you lose.";
     String loseLow = "Card is lower, you lose.";
     String loseMessageDetails = "";
     boolean gameLost = false;
     boolean askAgain = true;
     Scanner scan = new Scanner(System.in);
     String guess = "";
     Random rand = new Random();

     int card1;
     int card2;

     while(askAgain)
     {   
         if(gameLost)
         {
             System.out.println(loseMessageDetails + "\nWould you like to play again? Y/N");
             guess = "";
             while(!guess.equals("Y") && !guess.equals("N"))
             {
                 guess = scan.nextLine().toUpperCase();
             }

             if(guess.equals("Y"))
             {
                 gameLost = false;
                 askAgain = true;
             }
             else
             {
                 askAgain = false;
             }
         }

         if(!gameLost)
         {
             card1 = rand.nextInt(13) + 1;
             card2 = rand.nextInt(13) + 1;
             System.out.println("Card is: " + card1);
             guess = "";
             //loop until correct type of input
             while(!guess.equals("H") && !guess.equals("L"))
             {
                 System.out.printf(highLow);
                 guess = scan.nextLine().toUpperCase();
             }
             //now we either correctly guessed or incorrectly guessed
             //here is a correct guess
             if((card1 < card2 && guess.equalsIgnoreCase("H")) ||
                (card1 > card2 && guess.equalsIgnoreCase("L")))
             {
                 askAgain = true;
             }
             else
             {
                 loseMessageDetails = guess.equalsIgnoreCase("L") ? loseHigh : loseLow;
                 gameLost = true;
             }
         }
     }

这也将确保只有有效的输入，并继续要求输入，直到用户输入正确的字母