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Thread: Tic Toe java code exists when we enter 0 row and 0 column

  1. #1
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    Default Tic Toe java code exists when we enter 0 row and 0 column

    good afternoon everyone. i have been working on a tictactoe game using arrays and if statements and loops. my problem is the game exits when i type in row 0 and column 0. also i was wondering if you could help me change the input method so that the user could type in like 1 and it would place an x or an o in the box. also i just noticed it doesn't stop when you have three in a row

     import java.util.Scanner;
     
    /**
       This program runs a TicTacToe game. It prompts the
       user to set positions on the board and prints out the
       result.
    */
    public class TicTacToeRunner
    {
       public static void main(String[] args)
       {
          Scanner in = new Scanner(System.in);
          char player = 'x';
          TicTacToe game = new TicTacToe();
          boolean done = false;
        int Count=0;
          do{
             System.out.print(game.toString());
             System.out.print(
                   "Row for " + player );
             int row = in.nextInt();
     
     
     
                System.out.print("Column for " + player + ": ");
                int column = in.nextInt();
                game.set(row, column, player);
                if (player==('X'))
                   player = 'O';
                else
                   player = 'X';
             }while(!game.winner()&&Count<=9);
     
       }
    }
    /**
       A 3 x 3 tic-tac-toe board.
    */
    public class TicTacToe
    {
       /**
          Constructs an empty board.
       */
       public TicTacToe()
       {
          board = new char [ROWS][COLUMNS];
          // Fill with spaces
          for (int i = 0; i < ROWS; i++)
             for (int j = 0; j < COLUMNS; j++)
                board[i][j] =' ';
       }
     
       /**
          Sets a field in the board. The field must be unoccupied.
          @param i the row index
          @param j the column index
          @param player the player ("x" or "o")
       */
       public void set(int i, int j, char player)
       {
          if (board[i][j]== ' ')
             board[i][j] = player;
       }
     
       /**
          Creates a string representation of the board, such as
          |x  o|
          |  x |
          |   o|
          @return the string representation
       */
       public String toString()
       {
          String r = "";
         r+="   |   |   \n";
         r+=" "+board[0][0]+" |"+board[0][1]+"  |  "+board[0][2]+"\n";
         r+="   |   |   \n";
         r+="----------\n";
         r+="   |   |   \n";
         r+=" "+board[1][0]+" |"+board[1][1]+"  |  "+board[1][2]+"\n";
         r+="   |   |   \n";
         r+="----------\n";
         r+="   |   |   \n";
         r+=" "+board[2][0]+" |"+board[2][1]+"  |  "+board[2][2]+"\n";
         r+="   |   |   \n";
     
     
     
          return r;
       }
     
    public boolean winner()
    {
    boolean winner;
     
    if(board[0][0] == board[0][1] && board[0][1] == board[0][2]&&board[0][0] !=' ')
        return true;
    if(board[1][0] == board[1][1] && board[1][1] == board[1][2]&&board[1][0] !=' ')
        return true;
    if(board[2][0] == board[2][1] && board[2][1] == board[2][2]&&board[2][0] !=' ')
        return true;
    if(board[0][0] == board[1][0] && board[1][0] == board[2][0]&&board[0][0] !=' ')
        return true;
    if(board[0][1] == board[1][1] && board[1][1] == board[2][1]&&board[0][0] !=' ')
        return true;
    if(board[0][2] == board[1][2] && board[1][2] == board[2][2]&&board[0][0] !=' ')
        return true;
    if(board[0][0] == board[1][2] && board[1][2] == board[2][2]&&board[0][0] !=' ')
        return true;
    if(board[2][0] == board[1][2] && board[1][2] == board[2][1]&&board[0][0] !=' ')
        return true;
     
        return false;
    }
     
     
       private char[][] board;
       private static final int ROWS = 3;
       private static final int COLUMNS = 3;
     
    }
    thanks for all your help
    Last edited by JavaPF; May 9th, 2009 at 04:39 AM. Reason: Please use code tags


  2. #2
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    Default Re: help with tic tac toe

    hello again i just fixed the stopping when i put in 0,0 but it keeps going even if i have three x or o's it stops once i get all nine moves. i think i need an if statement in the tic tac toe runner? here is my updated class

    /**
       A 3 x 3 tic-tac-toe board.
    */
    public class TicTacToe
    {
       /**
          Constructs an empty board.
       */
       public TicTacToe()
       {
          board = new char [ROWS][COLUMNS];
          // Fill with spaces
          for (int i = 0; i < ROWS; i++)
             for (int j = 0; j < COLUMNS; j++)
                board[i][j] =' ';
       }
     
       /**
          Sets a field in the board. The field must be unoccupied.
          @param i the row index
          @param j the column index
          @param player the player ("x" or "o")
       */
       public void set(int i, int j, char player)
       {
          if (board[i][j]== ' ')
             board[i][j] = player;
       }
     
       /**
          Creates a string representation of the board, such as
          |x  o|
          |  x |
          |   o|
          @return the string representation
       */
       public String toString()
       {
          String r = "";
         r+="   |   |   \n";
         r+=" "+board[0][0]+" |"+board[0][1]+"  |  "+board[0][2]+"\n";
         r+="   |   |   \n";
         r+="----------\n";
         r+="   |   |   \n";
         r+=" "+board[1][0]+" |"+board[1][1]+"  |  "+board[1][2]+"\n";
         r+="   |   |   \n";
         r+="----------\n";
         r+="   |   |   \n";
         r+=" "+board[2][0]+" |"+board[2][1]+"  |  "+board[2][2]+"\n";
         r+="   |   |   \n";
     
     
     
          return r;
       }
     
    public boolean winner()
    {
    boolean winner;
     
    if(board[0][0] == board[0][1] && board[0][1] == board[0][2]&&board[0][0] !=' ')
        return true;
    if(board[1][0] == board[1][1] && board[1][1] == board[1][2]&&board[1][0] !=' ')
        return true;
    if(board[2][0] == board[2][1] && board[2][1] == board[2][2]&&board[2][0] !=' ')
        return true;
    if(board[0][0] == board[1][0] && board[1][0] == board[2][0]&&board[0][1] !=' ')
        return true;
    if(board[0][1] == board[1][1] && board[1][1] == board[2][1]&&board[0][2] !=' ')
        return true;
    if(board[0][2] == board[1][2] && board[1][2] == board[2][2]&&board[1][1] !=' ')
        return true;
    if(board[0][0] == board[1][2] && board[1][2] == board[2][2]&&board[1][2] !=' ')
        return true;
    if(board[2][0] == board[1][2] && board[1][2] == board[2][1]&&board[2][1] !=' ')
        return true;
     
        return false;
    }
     
     
       private char[][] board;
       private static final int ROWS = 3;
       private static final int COLUMNS = 3;
     
    }

    also i need help checking for a valid move.
    Last edited by big_c; May 11th, 2009 at 08:13 AM.

  3. #3
    mmm.. coffee JavaPF's Avatar
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    Default Re: help with tic tac toe

    Hello big_c, glad you solved this issue.

    What was the problem in the end?
    Please use [highlight=Java] code [/highlight] tags when posting your code.
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