day-2.cs

Normal: *Requirements 1. Game is played on a 3 x 3 board where players take turns putting 'X' and 'O' in an empty square. 2. A player wins by having all X's or all O's in vertically/horizantly/diagonally. 3. The board is drawn to the console each time a position is played.

Hard: Have the player play as the 'X' and the computer play as an 'O'

Nightmare: The computer plays intelligently (or at least as well as one would expect :) )

 class Program
    {
        private static object currentPlayer;

        static void DrawBoard(string[] box)
        {
            Console.Clear();
            Console.WriteLine($"{box[0]} | {box[1]} | {box[2]}");
            Console.WriteLine($"{box[3]} | {box[4]} | {box[5]}");
            Console.WriteLine($"{box[6]} | {box[7]} | {box[8]}");
        }


        static void Main(string[] mybox)
        {
            string[] board =  { "1", "2", "3",
                                "4", "5", "6",
                                "7", "8", "9" };
            string player = "O";
            Console.WriteLine("Get Ready For Some Tic Tac Toe!!!");
            DrawBoard(board);

            //draw the board
            DrawBoard(board);
            while (true)
            {
                //ask for a move from the current player]
                int position = AskForMove(player);
                //check if move is valid
                // bool valid = AskForMove(position);
                //if not then ask again
                //updated the board at the slot they specified.
                board[position - 1] = player;

                //check for the 8 possible win conditions.
                bool winner = winGame(board, player);

                //if they won, print they won
                if (winner == true)
                {
                    Console.WriteLine($"Player{player} Won!!!");
                    break;
                }
                //if the board is full, then print "tie game"
                bool noRoomOnBoard = maximumCapacity(board);
                if (noRoomOnBoard)
                {
                    Console.WriteLine($"Tie ;(");
                    break;
                }
                //otherwise swap player turns
                player = swapPlayer(player);
            }
            Console.ReadLine();
        }


        private static string swapPlayer(string player)
        {
            if (player == "O")
            {
                return "X";
            }
            else
            {
                return "O";
            }
        }

        private static int AskForMove(string player)
        {
            Console.WriteLine($"Your move player {player}");
            string move = Console.ReadLine();
            var moveAsNumber = int.Parse(move);
            return moveAsNumber;
        }

        private static bool maximumCapacity(string[] board)
        {
            foreach (var square in board)
            {
                //if not an x or o then there's a number and still playable
                if (square != "X" && square != "O") ;
            }
            {
                return (false);
            }
        }

        private static bool winGame(string[] board, string player)
        {
            if (board[0] == player && board[4] == player && board[8] == player)
            {
                return true;
            }
            if (board[2] == player && board[4] == player && board[6] == player)
            {
                return true;
            }
            if (board[0] == player && board[1] == player && board[2] == player)
            {
                return true;
            }
            if (board[3] == player && board[4] == player && board[5] == player)
                {
                return true;
            }
            if (board[6] == player && board[7] == player && board[8] == player)
                {
                return true;
            }
            if (board[0] == player && board[3] == player && board[6] == player)
            {
                return true;
            }
            if (board[1] == player && board[4] == player && board[7] == player)
            {
                return true;
            }
            if (board[2] == player && board[5] == player && board[8] == player)
            {
                return true;
            }
            if (board[0] == player && board[4] == player && board[8] == player)
            {
                return true;
            }

            return false;
        }

    }
}