java - Tic Tac Toe 游戏循环错误

Question

我在这里为我的java作业编写了井字棋游戏，一切都很好，除了一个小问题，即当您输入最后一步(第九回合)时，最后一个“X”不显示。这不仅很烦人，因为获胜的棋子没有显示，而且还导致了一些问题，即领带方法没有得到正确解决，因此什么也没有显示。

/*I have methods for drawing the board, determining a winner, and a loser. This is just the 'main' method containing the bulk of the program */

    public static void main (String[] args)
        {
        //Variable declaration
        Scanner kbReader = new Scanner(System.in);
        char [] [] Board = new char [3] [3] ;
        String MenuInput ;
        int BoardOutput ;
        int UserSpotChoice ;
        int ComputerSpotChoice = 0;
        int UserTurn = 1 ;
        int Winner = 0 ;
        Board [0] [0] = '-' ;
        Board [0] [1] = '-' ;
        Board [0] [2] = '-' ;
        Board [1] [0] = '-' ;
        Board [1] [1] = '-' ;
        Board [1] [2] = '-' ;
        Board [2] [0] = '-' ;
        Board [2] [1] = '-' ;
        Board [2] [2] = '-' ;

        //Welcome
        System.out.println ("Welcome to Alex Montague's Tic Tac Toe game!") ;
        System.out.println ("") ;
        System.out.println ("If you wish to play, type 'Play'") ; 
        System.out.println ("If you wish to read the instructions, type 'Instructions'") ;
        System.out.println ("If you wish to exit, type 'Exit'") ;
        MenuInput = kbReader.next () ;

        do
        {
        if (MenuInput.equals ("Play") || MenuInput.equals ("play")) 
        {
            while (!GameOver) 
            {
            System.out.println ("\f") ;
            System.out.println (" Tic Tac Toe") ;
            BoardOutput = DrawBoard (Board) ;
            System.out.println (" 1 2 3") ;
            System.out.println (" 4 5 6") ;
            System.out.println (" 7 8 9") ;
            System.out.println ("Please enter the number you would like to move your spot to") ;
            UserSpotChoice = kbReader.nextInt () ;

            if (UserSpotChoice == 1) Board [0] [0] = 'X' ;
            if (UserSpotChoice == 2) Board [0] [1] = 'X' ;
            if (UserSpotChoice == 3) Board [0] [2] = 'X' ;
            if (UserSpotChoice == 4) Board [1] [0] = 'X' ;
            if (UserSpotChoice == 5) Board [1] [1] = 'X' ;
            if (UserSpotChoice == 6) Board [1] [2] = 'X' ;
            if (UserSpotChoice == 7) Board [2] [0] = 'X' ;
            if (UserSpotChoice == 8) Board [2] [1] = 'X' ;
            if (UserSpotChoice == 9) Board [2] [2] = 'X' ;

            do
            {
                ComputerSpotChoice = (int) (Math.random() * 9 ) + 1 ; 
            }
            while
            (Board [(ComputerSpotChoice - 1) / 3] [(ComputerSpotChoice - 1) % 3] != '-') ;

            if (ComputerSpotChoice == 1) Board [0] [0] = 'O' ;
            if (ComputerSpotChoice == 2) Board [0] [1] = 'O' ;
            if (ComputerSpotChoice == 3) Board [0] [2] = 'O' ;
            if (ComputerSpotChoice == 4) Board [1] [0] = 'O' ;
            if (ComputerSpotChoice == 5) Board [1] [1] = 'O' ;
            if (ComputerSpotChoice == 6) Board [1] [2] = 'O' ;
            if (ComputerSpotChoice == 7) Board [2] [0] = 'O' ;
            if (ComputerSpotChoice == 8) Board [2] [1] = 'O' ;
            if (ComputerSpotChoice == 9) Board [2] [2] = 'O' ;

            Winner (Board) ;
            Loser (Board) ;
            Tie (Board) ;

            } //While loop
            if (GameOver) System.exit (0) ;
     } //If play

        else if (MenuInput.equals ("Instructions") || MenuInput.equals ("instructions")) 
        {
            System.out.println ("\f") ;
            System.out.println ("You will be playing the game of Tic Tac Toe against the computer.") ;
            System.out.println ("The object of this game is to get three of your own x's or o's in a line.") ;    
            System.out.println ("You take turns placing the x's and o's and whoever gets three in a row first wins.") ;
            System.out.println ("Good Luck!") ;
            System.out.println ("") ;
            System.out.println ("If you wish to play, type 'Play'") ;
            System.out.println ("If you wish to exit, type 'Exit'") ;
            MenuInput = kbReader.next () ;
        }

        else if (MenuInput.equals ("Exit") || MenuInput.equals ("exit")) 
        {
            System.out.println ("Thank you for using Alex Montague's Tic Tac Toe game!") ;
            System.exit (0) ;
        }

        else 
        {
            System.out.println ("Sorry, that is not a valid choice.") ;
            System.out.println ("If you wish to play, type 'Play'") ; 
            System.out.println ("If you wish to read the instructions, type 'Instructions'") ;
            System.out.println ("If you wish to exit, type 'Exit'") ;
            MenuInput = kbReader.next () ;
        }

        } //do while
        while (!MenuInput.equals ("Instructions") || !MenuInput.equals ("instructions") || !MenuInput.equals ("Play") || !MenuInput.equals ("play") || !MenuInput.equals ("Exit") || !MenuInput.equals ("exit")) ;

        } // main method

Answer 1

此声明:

        if (GameOver) System.exit (0) ;

可能是问题的根源。您检测到游戏结束并在此时退出程序。它永远不会循环显示板的当前状态。

要解决此问题，您可以:

• 在调用System.exit之前显示当前棋盘
• 决定游戏是否在程序中的不同点结束，也许是在打印当前棋盘之后