/*
** TttString is the object that contains the two dimensional
** Tic Tac Toe board in a a one dimentional form.  The board
** is converted from:
**     1 2 3
**     4 5 6
**     7 8 9
** to
**     1 2 3 4 5 6 7 8 9
** and it is stored in an integer variable.  The X is represented
** by a 1, the O by a 2, and an empty space by a 0.
*/
import java.io.*;
import java.lang.*;

class TttString
{
        //  the one dimensional board string.
    public int tttString;
    private int i;
    final static int X = 1, O = 2, EMPTY = 0;
        //  locations of the x's and o's
    private final static int LOCATIONS[] = {100000000, 10000000,
                                            1000000, 100000, 10000,
                                            1000, 100, 10, 1};


    //===============================================================
    //  Constructor
    //===============================================================
    TttString()
    {
            // The tictactoe board is empty
        ClearTttString();
    }

    //===============================================================
    //  Clear the content of the tic string
    //===============================================================
    public void ClearTttString()
    {
        tttString = 000000000;
    }


    //===============================================================
    //  Output the ticString to the screen
    //===============================================================
    public void OutTttString()
    {
            // convert the integer string to a character
            // string
        String sTttString = String.valueOf(tttString);
        int stringLength;
            // Add leading zeros to the string to make it look
            // good for printing
        stringLength = sTttString.length();
        for (i = 0; i < 9 - stringLength; i++)
        {
            sTttString = "0" + sTttString;
        }
        System.out.println(sTttString);
    }

    //===============================================================
    //  Set the ticString with the location of the tictactoe
    //  move, and wether it's x = 1 or o = 2.
    //===============================================================
    public boolean SetTttString(int location, int xo)
    {
            // No locations beyond the board are allowed and
            // No occupied locations can be overwritten.
        if (location >= 1 && location <= 9 && GetXO(location) == EMPTY)
        {
            tttString = tttString + LOCATIONS[location - 1] * xo;
        }
        else
        {
                // No setting occured
            return(false);
        }
        return(true);
    }


    //===============================================================
    //  Given the location tell me if there is an X or O or nothing
    //===============================================================
    public int GetXO(int location)
    {
        if (location >= 1 && location <=9)
        {
            return(tttString / LOCATIONS[location - 1] % 10);
        }
        else
        {
            System.out.println("Error: Attempt to address an incorrect location");
        }

        return(0);
    }


}