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Problem with C++ Program

dudelio (2)
Hi, I'm writing a C++ program for my class and I'm relatively new to this language. I'm using eclipse c/c++ to write my code and I've come up with the following:

TictactoeGame.cpp
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// Member-function definitions for class Game that plays Tic Tac Toe game
#include <iostream>
#include "TictactoeGame.h"
using namespace std;


// constructor to initialize member data location and BoardArray
TictactoeGame::TictactoeGame(string selection)
{
   Location = selection; //
   for ( int i = 0; i < 3; i++ )  // display a row
      {
   	  for ( int j = 0; j < 3; j++ )
          BoardArray[i][j] = ' '; // initialize a cell
      }
}


// function to set player's selection of location
// ensures that the location is a valid location in the 3 x3 grid board
void TictactoeGame::setLocation( string location)
{
   int index = 0;
   if ( location.compare("1 1") == 0) // row 1 column 1
   index = 1;
   else if ( location.compare("1 2") == 0) // row 1 column 2
   index = 2;
   else if ( location.compare("1 3") == 0) // row 1 column 3
   index = 3;
   else if ( location.compare("2 1") == 0) // row 2 column 1
   index = 4;
   else if ( location.compare("2 2") == 0) // row 2 column 2
   index = 5;
   else if ( location.compare("2 3") == 0) // row 2 column 3
   index = 6;
   else if ( location.compare("3 1") == 0) // row 3 column 1
   index = 7;
   else if ( location.compare("3 2") == 0) // row 3 column 2
   index = 8;
   else if ( location.compare("3 3") == 0) // row 3 column 3
   index = 9;
   else
   index = -1;

   switch(index)
   {
      case 1 :
         if ((BoardArray[0][0] == 'X') || (BoardArray[0][0] == 'O'))
            index = -2;
         else
            BoardArray[0][0] = 'X';
         break;
      case 2 :
          if ((BoardArray[0][1] == 'X') || (BoardArray[0][1] == 'O'))
             index = -2;
          else
             BoardArray[0][1] = 'X';
          break;
      case 3 :
          if ((BoardArray[0][2] == 'X') || (BoardArray[0][2] == 'O'))
             index = -2;
          else
             BoardArray[0][2] = 'X';
          break;
      case 4 :
          if ((BoardArray[1][0] == 'X') || (BoardArray[1][0] == 'O'))
             index = -2;
          else
             BoardArray[1][0] = 'X';
          break;
      case 5 :
          if ((BoardArray[1][1] == 'X') || (BoardArray[1][1] == 'O'))
             index = -2;
          else
             BoardArray[1][1] = 'X';
          break;
      case 6 :
          if ((BoardArray[1][2] == 'X') || (BoardArray[1][2] == 'O'))
             index = -2;
          else
             BoardArray[1][2] = 'X';
          break;
      case 7 :
          if ((BoardArray[2][0] == 'X') || (BoardArray[2][0] == 'O'))
             index = -2;
          else
             BoardArray[2][0] = 'X';
          break;
      case 8 :
          if ((BoardArray[2][1] == 'X') || (BoardArray[2][1] == 'O'))
             index = -2;
          else
             BoardArray[2][1] = 'X';
          break;
      case 9 :
          if ((BoardArray[2][2] == 'X') || (BoardArray[2][2] == 'O'))
             index = -2;
          else
             BoardArray[2][2] = 'X';
          break;
      case -1 :
    	  cout << "Invalid input, try again: " << endl;
          break;
      default :
         cout << "Invalid cell" << endl;
   } //end case

   if (index == -2)
	   cout << "The selected cell already filled , please choose another cell: " << endl;
} // end function setLocation


// function to retrieve the player's selected location
std::string TictactoeGame::getLocation() const
{
  	return Location;
} // end function setLocation


// prompt an input message
void TictactoeGame::displayMessage() const
{
   cout << "\nWelcome to play Tic Tac Toe \n" << endl;
   cout << "Enter a cell location (e.g. 1 3 represents first row, third column) or -1 to quit:  ";
   cin >> Location;
} // end function displayMessage


// display the 3 x 3 grid board status at the completion of each move by both the player and the game
void TictactoeGame::drawBoard() const
{
   for ( int i = 0; i < 3; i++ )  // display a row
	  for ( int j = 0; j < 3; j++ )
	  {
         cout << "| " << BoardArray[i][j] << " "; // draw a column
	     cout << endl << "-------------";
	  }
} // end function displayMessage


// determine if all squares are filled and who win
void determingResult() const
{
	cout << "This function hasn't down " ;

}


and
TictactoeGame.h
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/*
 * TictactoeGame.h
 *
 *  Created on: Jun 3, 2013
 *      Author: Blue Fire
 */

// Define of class Game that plays Tic Tac Toe with a user
// Member functions are defined in Game.cpp
#include <string>  // program uses C++ standard string  class

// TictactoeGame class definition
class TictactoeGame
{
public:
   explicit TictactoeGame(std::string); // constructor initialize location and grid board
   void setLocation( std::string ); // set selection of location
   std::string getLocation() const; //retrieve the selection of location
   void displayMessage() const; // prompt an input message
   void drawBoard() const; // display the 3 x 3 grid board
   void determingResult() const; // determine if all squares are filled and who win
private:
   std::string Location; //player's selection of location
   char BoardArray[3][3];
}; // end of class Game


The problem is that when compiling I get 2 errors and I'm not sure how to fix them. They are both in TictactoeGame.cpp:

1. line 125 with an error message of no match for 'operator>>' in 'std::cin >> ((const TictactoeGame*)this)->TictactoeGame::Location'

2. line 143 with an error message of non-member function `void determingResult()' cannot have `const' method qualifier

Any help for solving these two errors and getting the program to compile would be appreciated. Thanks ahead of time
vlad from moscow (6539)
Let begin from the error message

non-member function `void determingResult()' cannot have `const' method qualifier

What is not clear in this text?
MikeyBoy (5631)
1. line 125 with an error message of no match for 'operator>>' in 'std::cin >> ((const TictactoeGame*)this)->TictactoeGame::Location'

You've defined TictactoeGame::displayMessage() to be a const method, but you're trying to modify one of its data members within the method.

2. line 143 with an error message of non-member function `void determingResult()' cannot have `const' method qualifier

You've defined determingResult to be a global function, not a method of TictactoeGame.
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