用控制檯來寫五子棋練習。

下面是原始碼：
首先我寫了個Board類，用來處理跟棋盤有關的東西：
其成員有：

      private  int[,] checkerBoard = new int[20, 20];
      public enum checker{}
      private void show (){}
      public void update(int x, int y, checker c){}
      public bool isLand ( int x, int y ){}
      private bool win ( int x, int
 
 y ){}

詳細如下：

        private  int[,] checkerBoard = new int[20, 20];
        public enum checker
            {
            white,
            black
            }

        public Board ( )
            {
            for (int i = 0; i < 20; i++)
                {
                for (int j = 0; j < 20
 
; j++)
                    {
                    checkerBoard[i, j] = 0;
                    }
                }
            show ();
            }

       private void show ( )
            {
            for (int i = 0; i < 20; i++)
                {
                for (int j = 0; j < 20; j++)
                    {
                    if
 
(checkerBoard[i,j]==0)
                    Console.Write ( "■" );
                    else
                        {
                        if (checkerBoard[i, j] == 1)
                            Console.Write ( "○" );
                        else
                            Console.Write ( "●" );
                        }
                    }
                Console.WriteLine ();
                }
            }

        public void update ( int x, int y, checker c )
            {
            Console.Clear ();
            switch (c)
                {
                case checker.white:
                    if (isLand ( x, y ))
                        // checkerBoard[x, y] = "○";
                        checkerBoard[x, y] = 1;
                    break;
                case checker.black:
                    if (isLand ( x, y ))
                       // checkerBoard[x, y] = "●";
                    checkerBoard[x, y] = 2;
                    break;
                }
            show ();
            if (win ( x, y ))
                {
                Console.WriteLine ( "You're  winer" );
                }            
            }

        private bool win ( int x, int y )
            {
            bool isWin = false;
            int count = 0;
            int tempx = x, tempy = y;
            //1  
              while (y > 0)
                  {
                  if (checkerBoard[tempx, tempy] == checkerBoard[x, --y])
                      {
                      count++;
                      }
                  else
                      break;
                }
                  if (count >= 4)
                      {
                      return true;
                      }
             x = tempx;y = tempy;
           while (y <19)
               {
               if (checkerBoard[tempx, tempy] == checkerBoard[x, ++y])
                   {
                   count++;
                   }
               else
                   break;
               }
           if (count >= 4)
               {
               return true;
               }
           x=tempx;y = tempy;count = 0;
            //2
            while (x>0)
                {
                if (checkerBoard[tempx, tempy] == checkerBoard[--x, y])
                    {
                    count++;
                    }
                else
                    break;
                }
            if (count >= 4)
                {
                return true;
                }
            x = tempx; y = tempy;
            while (x < 19)
                {
                if (checkerBoard[tempx, tempy] == checkerBoard[++x, y])
                    {
                    count++;
                    }
                else
                    break;
                }
            if (count >= 4)
                {
                return true;
                }
            x = tempx;y = tempy;count = 0;
            //3
            while (y > 0&&x>0)
                {
                if (checkerBoard[tempx, tempy] == checkerBoard[--x, --y])
                    {
                    count++;
                    }
                else
                    break;
                }
            if (count >= 4)
                {
                return true;
                }
            x = tempx; y = tempy;
            while (y < 19&&x<19)
                {
                if (checkerBoard[tempx, tempy] == checkerBoard[++x, ++y])
                    {
                    count++;
                    }
                else
                    break;
                }
            if (count >= 4)
                {
                return true;
                }
            x = tempx;y = tempy;count=0;
           //4
           while (y > 0&&x<19)
               {
               if (checkerBoard[tempx, tempy] == checkerBoard[++x, --y])
                   {
                    count++;
                   }
               else
                   break;
               }
           if (count >= 4)
               {
               return true;
               }
           x = tempx; y = tempy;
           while (y < 19&&x>0)
               {
               if (checkerBoard[tempx, tempy] == checkerBoard[--x, ++y])
                   {
                   count++;
                   }
               else
                   break;
               }
           if (count >= 4)
               {
               return true;
               }
            return isWin;
                }        
        public bool isLand ( int x, int y )
            {
            bool T = true;
            if (checkerBoard[x, y] == 0)
                {
                T = true;
                }
            else
                {
                T = false;
                }
            return T;
            }

在Main方法裡就只關心，下棋這件事了：

  static void Main ( string[] args )
            {
            Console.SetWindowSize (40,20);
            Console.Title = "GoBang";
            Board board = new Board ();
            int left = 18, top = 9;
            bool isTurn = false;
            bool temp=false;   
            Console.SetCursorPosition ( left, top );  
            while (true)
                {
                ConsoleKey key = Console.ReadKey (true).Key;
                switch (key)
                    {
                    case ConsoleKey.W:
                    case ConsoleKey.UpArrow:
                        if (top <20&&top>0)
                            top--;                            
                        break;
                    case ConsoleKey.S:
                    case ConsoleKey.DownArrow:                       
                        if (top >=0)
                            top++;
                        if (top >= 19)
                            top = 19;
                        break;
                    case ConsoleKey.A:
                    case ConsoleKey.LeftArrow:
                        if (left > 0)
                            left = left - 2;
                        if (left <= 0)
                            left = 0;
                        break;
                    case ConsoleKey.D:
                    case ConsoleKey.RightArrow:
                        if (left/2 <20)
                            left = left + 2;
                        if (left / 2 >= 19)
                            left = 38;
                        break;
                    case ConsoleKey.Enter:
                    case ConsoleKey.Spacebar:
                         if (!board.isLand ( top, left / 2 ))
                             {
                             isTurn = !temp;
                             }
                        if (!isTurn)    //黑棋為先
                            {
                            Board.checker c = Board.checker.black;
                            board.update ( top, left/2, c );
                            isTurn = true;
                            }
                        else
                            {
                            Board.checker c = Board.checker.white;
                            board.update ( top, left/2, c );
                            isTurn = false;
                            }
                         temp = isTurn;
                        break;
                    }
                Console.SetCursorPosition ( left, top );
                }
            }

最後發個效果圖：