写个五子棋小游戏

好的，我可以给你提供一个简单的c#五子棋小游戏的示例代码，规则如下：

1. 两个玩家分别使用黑子和白子，轮流落子；
2. 落子时，玩家需要输入坐标，如“3,2”表示在第3行第2列落子；
3. 当一方连成五子时，游戏结束，显示胜利信息；
4. 如果棋盘填满仍未分出胜负，则宣布平局。

下面是示例代码：

using System;

namespace Gomoku
{
    class Program
    {
        static int[,] board = new int[15, 15]; // 棋盘，0表示空，1表示黑子，2表示白子
        static int currentPlayer = 1; // 当前玩家，1表示黑子，2表示白子

        static void Main(string[] args)
        {
            Console.WriteLine("欢迎来到五子棋游戏！");
            DrawBoard();

            while (true)
            {
                Console.WriteLine($"请 {GetPlayerName(currentPlayer)} 落子（输入坐标，如“3,2”）：");
                string input = Console.ReadLine();

                if (string.IsNullOrEmpty(input))
                {
                    Console.WriteLine("无效输入！");
                    continue;
                }

                string[] parts = input.Split(',');
                if (parts.Length != 2 || !int.TryParse(parts[0], out int row) || !int.TryParse(parts[1], out int col))
                {
                    Console.WriteLine("无效输入！");
                    continue;
                }

                if (row < 1 || row > 15 || col < 1 || col > 15)
                {
                    Console.WriteLine("坐标超出范围！");
                    continue;
                }

                if (board[row - 1, col - 1] != 0)
                {
                    Console.WriteLine("该位置已有棋子，请重新输入！");
                    continue;
                }

                board[row - 1, col - 1] = currentPlayer;
                DrawBoard();

                if (CheckWin(row - 1, col - 1))
                {
                    Console.WriteLine($"恭喜 {GetPlayerName(currentPlayer)} 获胜！");
                    break;
                }

                if (CheckDraw())
                {
                    Console.WriteLine("平局！");
                    break;
                }

                currentPlayer = currentPlayer == 1 ? 2 : 1;
            }

            Console.WriteLine("按任意键结束游戏...");
            Console.ReadKey();
        }

        static void DrawBoard()
        {
            Console.Clear();
            Console.WriteLine("  1 2 3 4 5 6 7 8 9 10 11 12 13 14 15");
            for (int i = 0; i < 15; i++)
            {
                Console.Write($"{i + 1} ");
                for (int j = 0; j < 15; j++)
                {
                    switch (board[i, j])
                    {
                        case 0:
                            Console.Write("+ ");
                            break;
                        case 1:
                            Console.Write("● ");
                            break;
                        case 2:
                            Console.Write("○ ");
                            break;
                    }
                }
                Console.WriteLine();
            }
        }

        static bool CheckWin(int row, int col)
        {
            int count = 1;
            int x, y;

            // 横向
            x = col - 1;
            y = row;
            while (x >= 0 && board[y, x] == currentPlayer)
            {
                count++;
                x--;
            }
            x = col + 1;
            while (x < 15 && board[y, x] == currentPlayer)
            {
                count++;
                x++;
            }
            if (count >= 5)
            {
                return true;
            }

            // 纵向
            count = 1;
            x = col;
            y = row - 1;
            while (y >= 0 && board[y, x] == currentPlayer)
            {
                count++;
                y--;
            }
            y = row + 1;
            while (y < 15 && board[y, x] == currentPlayer)
            {
                count++;
                y++;
            }
            if (count >= 5)
            {
                return true;
            }

            // 左上到右下
            count = 1;
            x = col - 1;
            y = row - 1;
            while (x >= 0 && y >= 0 && board[y, x] == currentPlayer)
            {
                count++;
                x--;
                y--;
            }
            x = col + 1;
            y = row + 1;
            while (x < 15 && y < 15 && board[y, x] == currentPlayer)
            {
                count++;
                x++;
                y++;
            }
            if (count >= 5)
            {
                return true;
            }

            // 右上到左下
            count = 1;
            x = col + 1;
            y = row - 1;
            while (x < 15 && y >= 0 && board[y, x] == currentPlayer)
            {
                count++;
                x++;
                y--;
            }
            x = col - 1;
            y = row + 1;
            while (x >= 0 && y < 15 && board[y, x] == currentPlayer)
            {
                count++;
                x--;
                y++;
            }
            if (count >= 5)
            {
                return true;
            }

            return false;
        }

        static bool CheckDraw()
        {
            for (int i = 0; i < 15; i++)
            {
                for (int j = 0; j < 15; j++)
                {
                    if (board[i, j] == 0)
                    {
                        return false;
                    }
                }
            }
            return true;
        }

        static string GetPlayerName(int player)
        {
            return player == 1 ? "黑子" : "白子";
        }
    }
}

希望这个示例代码可以帮助你了解如何使用c#编写一个简单的五子棋小游戏。