public void MainMethod()
{
board = new TicTacToeBoard();
Console.WriteLine("Hello! To play tic tac toe, when it is your turn, enter the index of where you want to play (0-8)");
Console.Read();
while (!board.IsFull() && !board.IsWinner(SquareType.X) && !board.IsWinner(SquareType.O))
{
DisplayBoardGrid();
Console.WriteLine("It is {0} turn.", currentTurn);
int move = promptForInt("Enter your index: ");
if (board.IsLegalMove(move))
board.MakeMove(move, currentTurn);
else
{
Console.WriteLine("Illegal Move! Press enter!");
Console.Read();
continue;
}
// Swap the turn
currentTurn = currentTurn == SquareType.X ? SquareType.O : SquareType.X;
}
DisplayBoardGrid();
if (board.IsFull())
Console.WriteLine("Tie! Board is full!");
else if (board.IsWinner(SquareType.X))
AccounceWinner(SquareType.X);
else if (board.IsWinner(SquareType.O))
AccounceWinner(SquareType.O);
else
Console.WriteLine("Something has gone wrong!");
}
/// <summary>
/// Plays the game.
/// </summary>
public void Play()
{
int move;
bool over = false;
Move currentPlayer = Move.X;
var board = new TicTacToeBoard();
// Print a greeting.
Console.WriteLine("xox Play Tic-Tac-Toe! xox" + Newline);
// Keep going until the game is deemed "over"
while (!over)
{
// Print the board.
Console.WriteLine(board.ToString());
Console.WriteLine("Player 1 => X, Player 2 => O");
// Ask the player to enter a square number
Console.Write("Enter Square [player " + PrintMove(currentPlayer) + "]: ");
var playersMove = Console.ReadLine();
Console.Write(Newline);
// Process player's move
if (int.TryParse(playersMove, out move))
{
try
{
// Attempt to make the move, then change players.
board.MakeMove(move, currentPlayer);
currentPlayer = FlipCurrentPlayer(currentPlayer);
}
catch (Exception e)
{
Console.WriteLine(e.Message + Newline);
}
}
else
{
// Just in case someone doesn't give us an int.
Console.WriteLine("Unable to parse your move, please try again." + Newline);
}
// A little magic here. If the board has a winner set then we're done.
if (board.Winner != null)
{
this.PrintEndGame(board);
over = true;
}
}
}
/// <summary>
/// Plays the game.
/// </summary>
public void Play()
{
int move;
bool over = false;
Move currentPlayer = Move.X;
var board = new TicTacToeBoard();
// Print a greeting.
Console.WriteLine("xox Play Tic-Tac-Toe! xox" + Newline);
// Keep going until the game is deemed "over"
while (!over)
{
// Print the board.
Console.WriteLine(board.ToString());
Console.WriteLine("Player 1 => X, Player 2 => O");
// Ask the player to enter a square number
Console.Write("Enter Square [player " + PrintMove(currentPlayer) + "]: ");
var playersMove = Console.ReadLine();
Console.Write(Newline);
// Process player's move
if (int.TryParse(playersMove, out move))
{
try
{
// Attempt to make the move, then change players.
board.MakeMove(move, currentPlayer);
currentPlayer = FlipCurrentPlayer(currentPlayer);
}
catch (Exception e)
{
Console.WriteLine(e.Message + Newline);
}
}
else
{
// Just in case someone doesn't give us an int.
Console.WriteLine("Unable to parse your move, please try again." + Newline);
}
// A little magic here. If the board has a winner set then we're done.
if (board.Winner != null)
{
this.PrintEndGame(board);
over = true;
}
}
}
public void TakeATurn(TicTacToeBoard board)
{
board.DisplayBoard();
bool validMove = false;
while (!validMove)
{
Console.WriteLine("Please make a move (1-9):");
int move;
if (Int32.TryParse(Console.ReadLine(), out move))
{
if (board.GetMove(move) == 0)
{
board.MakeMove(move, 2);
validMove = true;
}
else
{
Console.WriteLine("Invalid move. Please try again.");
}
}
else
{
Console.WriteLine("Invalid syntax. Please try again.");
}
}
}
public void PlayAGame()
{
TicTacToeBot ai = new TicTacToeBot();
TicTacToeBoard board = new TicTacToeBoard();
Random rng = new Random();
bool yourTurn;
Console.WriteLine("Randomizing who starts...");
if (rng.Next(2) == 0)
{
Console.WriteLine("You start!");
yourTurn = true;
}
else
{
Console.WriteLine("AI starts.");
yourTurn = false;
}
int winner = 0;
bool draw = false;
while (winner == 0 && !draw)
{
if (yourTurn)
{
TakeATurn(board);
}
else
{
board.MakeMove(ai.GetBestMove(board), 1);
}
yourTurn = !yourTurn;
winner = board.CheckForWin();
draw = board.CheckForDraw();
}
board.DisplayBoard();
if (winner == 1)
{
Console.WriteLine("AI wins.");
}
else if (winner == 2)
{
Console.WriteLine("You win!");
}
else
{
Console.WriteLine("Draw game.");
}
}
public double AlphaBeta(TicTacToeBoard oldBoard, double alpha, double beta, int player)
{
if (oldBoard.CheckForWin() != 0 || oldBoard.CheckForDraw())
{
return Score(oldBoard);
}
if (player == 1)
{
double val = -10000.0;
for (int i = 1; i <= 9; i++)
{
if (oldBoard.GetMove(i) == 0)
{
TicTacToeBoard newBoard = new TicTacToeBoard(oldBoard);
newBoard.MakeMove(i, player);
val = Math.Max(val, gamma * AlphaBeta(newBoard, alpha, beta, 2));
alpha = Math.Max(alpha, val);
if (beta <= alpha) break;
}
}
return alpha;
}
else
{
double val = 10000.0;
for (int i = 1; i <= 9; i++)
{
if (oldBoard.GetMove(i) == 0)
{
TicTacToeBoard newBoard = new TicTacToeBoard(oldBoard);
newBoard.MakeMove(i, player);
val = Math.Min(val, gamma * AlphaBeta(newBoard, alpha, beta, 1));
beta = Math.Min(val, beta);
if (beta <= alpha) break;
}
}
return beta;
}
}
public int GetBestMove(TicTacToeBoard board)
{
double max = -100000.0;
int bestMoveSoFar = 0;
for (int i = 1; i <= 9; i++)
{
if (board.GetMove(i) == 0)
{
TicTacToeBoard testBoard = new TicTacToeBoard(board);
testBoard.MakeMove(i, 1);
double moveScore = AlphaBeta(testBoard, -10000.0, 10000.0, 2);
if (moveScore > max)
{
max = moveScore;
bestMoveSoFar = i;
}
}
}
return bestMoveSoFar;
}
