Tic-tac-toe Tutorial (Step 3)

ttt_3.cpp

#include <iostream>
#include <cstdlib>
#include <ctime>
using namespace std;

/** 
 * Draw a 3x3 tic-tac-toe board with row and column labels
 * The cell data in board will be interpreted as follows:
 *   1 = owned by 'x'
 *   2 = owned by 'o'
 *   all other values = empty
 *
 * @param  int[3][3] board The current state of each board cell
 * @return void
 */
void drawBoard(int board[][3]) {
  cout << "  " << "  A   B   C  " << endl;
  cout << "  " << "+---+---+---+" << endl;
  for (int row = 0; row < 3; row++) {
    cout << row << " ";
    for (int col = 0; col < 3; col++) {
      switch (board[row][col]) {
        case 1: cout << "| " << "x" << " "; break;
        case 2: cout << "| " << "o" << " "; break;
        default:cout << "| " << " " << " "; break;
      }
    }
    cout << "|" << endl;
    cout << " " << " " << "+---+---+---+" << endl;
  }
}


int main (int argc, char* argv[])
{
  // State variables
  //
  // Board:
  //     0   1   2
  //   +---+---+---+
  // 0 |   |   | x | x = board[0][2]
  //   +---+---+---+
  // 1 |   |   |   |
  //   +---+---+---+
  // 2 |   |   |   |
  //   +---+---+---+
  //
  // Each board square will be in one of three possible
  // states:  0=empty, 1=owned by 'x', 2=owned by 'o'.
  int board[3][3] = {};

  // Flag to determine whether or not the game is finished
  // false: game should end: someone has won or there are no more valid moves
  // true:  game may continue
  bool gameIsValid = true;

  // Flag to determine whose turn it is
  // false: it is the computer's turn to make a move
  // true:  it is the player's turn to make a move
  bool playerTurn = true;


  /* Game Flow */

  // 1. determine who goes first
  playerTurn = rand() % 2; // coin flip

  // 2. Enter the main game "loop"
  while (gameIsValid) {
    // a. draw the board
    drawBoard(board);
    
    // b. current player makes a move
    
    // c. check if the current player has just won

    // d. swap current player
    
  }

  // 3. print final game result message

}