Thread: function trouble

Hi Guys,

Trying to create a tictactoe game, and am working on a function for getting one of the two users playing to see what the outcome of the game is. So far I have got it as follows:

Code:

TicTacToe:: Status TicTacToe:: gameStatus gameStatus(void)
{  
  // Check for win in diagonals //
  if (board [0][0]!= '_' && board [0][0] == board [1][1] 
  && board [0][0] == board [2][2])
  return WIN;
  else if (board [0][2]!= '_' && board [0][2] == board [1][1] 
  && board [0][2] == board [2][0])
  return WIN;
  //** End Check for win in diagonals ** //

  // Check for win in rows  //
  if (board [0][0]!= '_' && board [0][0] == board [1][0] 
  && board [0][0] == board [2][0])
  return WIN;
    else if (board [0][1]!= '_' && board [0][1] == board [1][1] 
  && board [0][1] == board [2][2])
  return WIN; 
    else if (board [0][2]!= '_' && board [0][2] == board [1][2] 
  && board [0][2] == board [2][2])
  return WIN; 
  //** End Check for win in rows  **//  
  
  // Check for win in columns  //
  if (board [0][0]!= '_' && board [0][0] == board [0][1] 
  && board [0][0] == board [0][2])
  return WIN;
    else if (board [1][0]!= '_' && board [1][0] == board [1][1] 
  && board [1][0] == board [1][2])
  return WIN;
   else if (board [2][0]!= '_' && board [2][0] == board [2][1] 
  && board [2][0] == board [2][2])
  return WIN; 
  // ** End Check for win in columns ** //
  
  // Check for a completed game //
   return CONTINUE;     // game is not finished
  // ** End Check for completed game ** //

  
 // Check for a draw // 
return DRAW; // game is a draw
  // ** End Check for draw ** //

}

Now as you can see I have tried to do is say get the winners for diagonals, columns and rows.

What I need to do now is check for a drawn game, which I think I need to state something like, if move >9 (it’s a 3x3 board) then Return Draw. And also check for a completed game? But I’m stuck on how to do these two!

Can someone please advise if I am going right so far and also how I’d go about checking for a completed game and a draw?

Many Thanks

Rebel

to check if the game is complete
If any array value is still it's initial value then it's not complete.

Code:

int isComplete(array)
{
   for(i=0; i < row; i++) {    
      for(j=0; j < col; j++) {
         if(array[i][j] == empty) {
            return 0;
         }
      }
   }
   return 1;
}

for a draw
if game is complete and player one hasn't won and player two hasn't won then the game is a draw

Hi Guys,

Thanks for your help - much appreciated!

Think i'm getting somewhere now, but am a little stuck. Here's what I have done so far:

Code:

// TICTACTOE.H
// A Program to run the Tic-Tac-Toe Program
#include <iostream.h>
#include <iomanip.h>
class TicTacToe
{
   private:
     enu Status {WIN, DRAW, CONTINUE };
     char board [3] [3];
   public:
     TicTacToe ();
     void makeMove ();
     void printBoard ();
     bool validMove (int r, int c);
     bool xoMove (int input)
     Status gameStatus ();
     void holdscreen ();
};

TicTacToe:: TicTacToe ()
{        
// Initialising TicTacToe //    
  for (int r = 0; r < r; r++) //looping rows?
  for (int c = 0; c < c; c++) //looping columns?
  validMove[r][c] = '_';

// ** End TicTacToe ** //
// ** IS THIS SETTING EVERY ELEMENT ON THE BOARD TO A SPACE? ** //
}

bool TicTacToe::validMove (int r, int c)
{

// Validate Move Start for X //
cout << "Enter coordinates for X: ";
    cin >> r;
    while(true) {
    if ((r>=3) || (r<0))
    cout<<endl<<"invalid move. try again with a number from 0 to 2: ";
else break;}
// ** End Validate Move Start for X ** //
 
// Validate Move Start for O //
cout << "Enter coordinates for O: ";
    cin >> c;
    while(true) {
    if ((c>=3) || (c<0))
    cout<<endl<<"invalid move. try again with a number from 0 to 2: ";
else break;}
// ** End Validate Move Start for O ** //

}

TicTacToe:: Status TicTacToe:: gameStatus gameStatus(void)
{
  int a;
  
  // Check for win in diagonals //
  if (board [0][0]!= '_' && board [0][0] == board [1][1] 
  && board [0][0] == board [2][2])
  return WIN;
  else if (board [0][2]!= '_' && board [0][2] == board [1][1] 
  && board [0][2] == board [2][0])
  return WIN;
  //** End Check for win in diagonals ** //

  // Check for win in rows
  if (board [0][0]!= '_' && board [0][0] == board [1][0] 
  && board [0][0] == board [2][0])
  return WIN;
    else if (board [0][1]!= '_' && board [0][1] == board [1][1] 
  && board [0][1] == board [2][2])
  return WIN; 
    else if (board [0][2]!= '_' && board [0][2] == board [1][2] 
  && board [0][2] == board [2][2])
  return WIN; 
  //** End Check for win in rows  **//  
  
  // Check for win in columns
  if (board [0][0]!= '_' && board [0][0] == board [0][1] 
  && board [0][0] == board [0][2])
  return WIN;
    else if (board [1][0]!= '_' && board [1][0] == board [1][1] 
  && board [1][0] == board [1][2])
  return WIN;
   else if (board [2][0]!= '_' && board [2][0] == board [2][1] 
  && board [2][0] == board [2][2])
  return WIN; 
  // ** End Check for win in columns ** //
  
  // Check for a completed game
{
   for(r=0; r < r; r++) {    
      for(c=0; c < c; C++) {
         if(array[r][c] == empty) {
            return 0;
         }
      }
   }
   return CONTINUE; 
}  
  else
  return DRAW; // game is a draw
}

void TicTacToe::printBoard (void)
{
     cout << "   0   1   2\n\n";
     
     for ( int r=0; r < 3; ++r ) {
         cout << r;
         
         for ( int c=0; c < 3; ++c ) {
             cout << setw (3) << static_cast < char > ( board [r] [c] );
             
             if (c !=2 )
                cout << " |";
         }
         
         if (r != 2)
            cout << "\n ______|______|______"
                 << "\n ______|______|______\n"
         }
     
     cout <<"\n\n";
     
void  TicTacToe::makeMove(void)
{
   printBoard();
   
   while ( true ) {
      if (xoMove ( 'X' ) )
         break;
   else if (xoMove ( 'O' ) )
         break;
   }
}

bool TicTacToe::xoMove (int symbol )
{
   int x,y;
   
   do {
       cout << "Player" << static_cast < char > (symbol) << " enter move: ";
       cin >> x >> y;
       cout << '\n';
   } while ( !validMove ( x, y ) );
   
   board [x] [y] = symbol;
   printBoard();
   Status xoStatus = gamestatus();
   
   if ( xoStatus == WIN ) {
      cout << "Player " << static_cast < char > (symbol ) << " wins!\n";
      return true;
   }
   else if (xoStatus == DRAW ) {
        cout << "Game is a draw. \n";
        return true;
   }
   else //Continue
        return false;
}

Now i'm not sure on two bits;

initialising the table

Code:

TicTacToe:: TicTacToe ()
{        
// Initialising TicTacToe //    
  for (int r = 0; r < r; r++) //looping rows?
  for (int c = 0; c < c; c++) //looping columns?
  validMove[r][c] = '_';

// ** End TicTacToe ** //
// ** IS THIS SETTING EVERY ELEMENT ON THE BOARD TO A SPACE? ** //
}

Would the above be setting every element on the board to a space?

Checking the game status

Code:

TicTacToe:: Status TicTacToe:: gameStatus gameStatus(void)
{
  int a;
  
  // Check for win in diagonals //
  if (board [0][0]!= '_' && board [0][0] == board [1][1] 
  && board [0][0] == board [2][2])
  return WIN;
  else if (board [0][2]!= '_' && board [0][2] == board [1][1] 
  && board [0][2] == board [2][0])
  return WIN;
  //** End Check for win in diagonals ** //

  // Check for win in rows
  if (board [0][0]!= '_' && board [0][0] == board [1][0] 
  && board [0][0] == board [2][0])
  return WIN;
    else if (board [0][1]!= '_' && board [0][1] == board [1][1] 
  && board [0][1] == board [2][2])
  return WIN; 
    else if (board [0][2]!= '_' && board [0][2] == board [1][2] 
  && board [0][2] == board [2][2])
  return WIN; 
  //** End Check for win in rows  **//  
  
  // Check for win in columns
  if (board [0][0]!= '_' && board [0][0] == board [0][1] 
  && board [0][0] == board [0][2])
  return WIN;
    else if (board [1][0]!= '_' && board [1][0] == board [1][1] 
  && board [1][0] == board [1][2])
  return WIN;
   else if (board [2][0]!= '_' && board [2][0] == board [2][1] 
  && board [2][0] == board [2][2])
  return WIN; 
  // ** End Check for win in columns ** //
  
  // Check for a completed game
{
   for(r=0; r < r; r++) {    
      for(c=0; c < c; C++) {
         if(array[r][c] == empty) {
            return 0;
         }
      }
   }
   return CONTINUE; 
}  
  else
  return DRAW; // game is a draw
}

As i've established by code for checking for a winner in rows and columns is right and i've been helped with the check for the completed game, so ELSE it would be a draw?

Thanks

Reb