Thread: Another Tic Tac Toe

Well after my exams I have had trouble getting back into C++ so I thought I would start with something easy like Tic Tac Toe.

Header File:

Code:

void drawboard () {
cout << board[0][0] << '|' << board[0][1] << '|' << board[0][2] << endl;
cout << "-----" << endl;
cout << board[1][0] << '|' << board[1][1] << '|' << board[1][2] << endl;
cout << "-----" << endl;
cout << board[2][0] << '|' << board[2][1] << '|' << board[2][2] << endl;
cout << endl;
}

char turn () {
     int temp = pturn % 2;
     char player;
          if (temp != 0) {
          player = 'O';
          }
          else {
          player = 'X';
          }
return  player;
}



void move () {

int row;
int col;

do {
   cout << "Player " << pchar << "'s turn" << endl << endl;
   cout << "Please enter the row number: ";
   cin >> row;
   cout << "Please enter the column number: ";
   cin >> col;
   --row;
   --col;
   if (!usedsq[row][col]) {
      break;
   }
cout << endl << "Sorry that square is taken" << endl;
cin.ignore();
cin.get();
system("CLS");
drawboard();
} while (1);

board[row][col] = pchar;
usedsq[row][col] = true;
system("CLS");

}

void win() {

if (board[0][0] == 'X' &&  board[0][1] == 'X' &&
    board[0][2] == 'X') {

    cout << "Congratulations Player X has won!" << endl;
    pwin = true;
    }

else if (board[1][0] == 'X' &&  board[1][1] == 'X' &&
    board[1][2] == 'X') {

    cout << "Congratulations Player X has won!" << endl;
    pwin = true;
    }

else if (board[2][0] == 'X' &&  board[2][1] == 'X' &&
    board[2][2] == 'X') {

    cout << "Congratulations Player X has won!" << endl;
    pwin = true;
    }

else if (board[0][0] == 'X' &&  board[1][1] == 'X' &&
    board[2][2] == 'X') {

    cout << "Congratulations Player X has won!" << endl;
    pwin = true;
    }

else if (board[0][2] == 'X' &&  board[1][1] == 'X' &&
    board[2][0] == 'X') {

    cout << "Congratulations Player X has won!" << endl;
    pwin = true;
    }

else if (board[0][0] == 'X' &&  board[1][0] == 'X' &&
    board[2][0] == 'X') {

    cout << "Congratulations Player X has won!" << endl;
    pwin = true;
    }

else if (board[0][1] == 'X' &&  board[1][1] == 'X' &&
    board[2][1] == 'X') {

    cout << "Congratulations Player X has won!" << endl;
    pwin = true;
    }

else if (board[0][2] == 'X' &&  board[1][2] == 'X' &&
    board[2][2] == 'X') {

    cout << "Congratulations Player X has won!" << endl;
    pwin = true;
    }

if (board[0][0] == 'O' &&  board[0][1] == 'O' &&
    board[0][2] == 'O') {

    cout << "Congratulations Player O has won!" << endl;
    pwin = true;
    }

else if (board[1][0] == 'O' &&  board[1][1] == 'O' &&
    board[1][2] == 'O') {

    cout << "Congratulations Player O has won!" << endl;
    pwin = true;
    }

else if (board[2][0] == 'O' &&  board[2][1] == 'O' &&
    board[2][2] == 'O') {

    cout << "Congratulations Player O has won!" << endl;
    pwin = true;
    }

else if (board[0][0] == 'O' &&  board[1][1] == 'O' &&
    board[2][2] == 'O') {

    cout << "Congratulations Player O has won!" << endl;
    pwin = true;
    }

else if (board[0][2] == 'O' &&  board[1][1] == 'O' &&
    board[2][0] == 'O') {

    cout << "Congratulations Player O has won!" << endl;
    pwin = true;
    }

else if (board[0][0] == 'O' &&  board[1][0] == 'O' &&
    board[2][0] == 'O') {

    cout << "Congratulations Player O has won!" << endl;
    pwin = true;
    }

else if (board[0][1] == 'O' &&  board[1][1] == 'O' &&
    board[2][1] == 'O') {

    cout << "Congratulations Player O has won!" << endl;
    pwin = true;
    }

else if (board[0][2] == 'O' &&  board[1][2] == 'O' &&
    board[2][2] == 'O') {

    cout << "Congratulations Player O has won!" << endl;
    pwin = true;
    }
}

*That is a very long conditional statement I have there, wasn't sure how to cut it down*

Main:

Code:

#include <iostream>
#include <cstdlib>
#include "TicHead.h"

using namespace std;

int main()
{
      int menuselect;
      char end = 'N';
      int noturns = 0;

      cout << endl << "Welcome to Bumfluff's Tic Tac Toe" << endl;
      cout << endl << "\t1. Start Game" << endl;
      cout << "\t2. Instructions" << endl;
      cout << "\t3. Quit" << endl;
      cout << endl << "Please make a selection: ";
      cin >> menuselect;
      system("CLS");

      switch (menuselect) {
             case 1:
                  break;
             case 2:
                  cout << "This is a two player game." << endl;
                  cout << "Type the number of the square" <<endl;
                  cout << "and press enter to put your character" << endl;
                  cout << "into your chosen square. You choose" << endl;
                  cout << "the square by selecting the column and row." << endl;
                  cout << endl << "The  first person to get three in a row WINS!" << endl;
                  cout << endl << "Press [ENTER] To Start Game: ";
                  cin.ignore();
                  cin.get();
                  break;
            case 3:
                 return 0;
            default:
                 return -1;
      }

do {
      pturn = 0;
      noturns = 0;
      do {
      system("CLS");
      drawboard();
      pchar = turn();
      move();
      win();
      if (pwin) break;
      ++pturn;
      if (noturns == 8) {
      cout << "You have drawn" << endl;
      break;
      }
      ++noturns;
      } while (1);

      cout << endl << "Would you like to play again? (Y/N): ";
      cin >> end;
      if (end == 'N' || end == 'n') break;

      for (int i = 0; i < 3; i++) {
          for (int j = 0; j < 3;  j++){
              board[i][j] = 0;
              usedsq[i][j] = 0;
          }
      }
} while (1);

      return 0;
}

*I know I have used system commands*

My question is how would I go about making this a 1 player vs. computer game ie. how I make the algorithms.

Yeah I can see that, but then again that doesnt use the symbold in between, but for any other grid that would be useful.

I am jsut about to edit the code so it works properly.

The game actually has a few bugs as I realised that you can't draw or play again...solving them.

Solved, they were very very minor changes.

Now, to the nitty gritty, creating a computer player.

For an idea on how to implement a tic-tac-toe AI

Thanks that is really useful, could I make 8 structures of every line or something and in that stores each location of that line and works out the priority of that line.