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C#實現(xiàn)撲克游戲(21點)的示例代碼

 更新時間：2022年08月17日 10:37:21   作者：陳言必行  
21點又名黑杰克，該游戲由2到6個人玩，使用除大小王之外的52張牌，游戲者的目標(biāo)是使手中的牌的點數(shù)之和不超過21點且盡量大。本文將用C#實現(xiàn)這一經(jīng)典游戲，需要的可以參考一下

一、游戲介紹

1.1 游戲規(guī)則

21點又名黑杰克，該游戲由2到6個人玩，使用除大小王之外的52張牌，游戲者的目標(biāo)是使手中的牌的點數(shù)之和不超過21點且盡量大。

1.2 牌點計算

A至10牌，按其原點數(shù)計算；J、Q、K都算作10點。

1.3 判斷勝負(fù)

二十一點玩法規(guī)則和概率在二十一點游戲中，擁有最高點數(shù)的玩家獲勝，其點數(shù)必須等于或低于21點；超過21點的玩家稱為爆牌。擁有最高點數(shù)的玩家獲勝，其點數(shù)必須等于或低于21點；超過21點之間判負(fù)。

二、游戲設(shè)計

2.1 游戲流程

發(fā)牌：

玩家和AI每人發(fā)兩張牌，由手牌點數(shù)和大的玩家優(yōu)先選擇是否在牌堆中取牌

取牌：

手牌點數(shù)和小于21，等待1中優(yōu)先選擇后再順時針輪到其他玩家選擇是否取牌

取牌后：

若牌點大于21則直接判負(fù)出局，場上只剩1人，直接游戲結(jié)束；否則重復(fù)2-3

若牌點小于等于21則輪到下家取牌，重復(fù)2-3

游戲結(jié)束

其他玩家取牌后都超過21點，只剩1人，直接獲勝

所有玩家都選擇不取牌后，按規(guī)則比較所有玩家手牌點數(shù)和，牌點大的獲勝。

2.2 玩家類

由玩家自己選擇是否繼續(xù)拿牌。（輸入Y繼續(xù)拿牌，N為不拿牌）

2.3 AI類

簡化AI邏輯，發(fā)牌后AI手牌和為4-8時繼續(xù)拿牌，一直到17點或17點以上不再拿牌；因為此時再拿牌就有一半以上的概率超過21點。

三、參考代碼

using System;

namespace _21dian
{
    using System;
    using System.Collections.Generic;

    namespace Game21Points
    {
        class Project
        {
            static void Main(string[] args)
            {
                Console.WriteLine("----- 游戲開始 -----");

                // 撲克牌
                List<int> cards = new List<int>()
                {
                    1,  2,  3,  4,  5,  6,  7,  8,  9,  10, 11, 12, 13,
                    14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26,
                    27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39,
                    40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52
                };

                // 創(chuàng)建對象
                Poker poker = new Poker(cards);
                Player player = new Player();
                AIPlayer ai = new AIPlayer();

                // --> 玩家入場
                player.playerName = "Czhenya";
                ai.playerName = "AI";

                poker.AddPlayer(player);
                poker.AddPlayer(ai);

                // 事件關(guān)系綁定
                poker.GameSratrHandler += player.GameStart;
                poker.GameSratrHandler += ai.GameStart;

                // 游戲開始 
                poker.GameStart();

                // 每人發(fā)兩張牌
                poker.SendCard();
                poker.SendCard();

                // 詢問取牌
                poker.TaskCard();

                Console.ReadKey();
            }
        }

        abstract class AbsPlayer
        {
            public string playerName;
            public bool IsContinueTakeCard = true;
            public List<int> handCards = new List<int>();

            public abstract void GameStart();

            public virtual void SendCard(int card)
            {
                handCards.Add(card);
            }

            public abstract bool TakeCard();

            public bool GameOver()
            {
                bool isGameOver;
                if (HandCardsPoint > 21)
                {
                    isGameOver = true;
                }
                else
                {
                    isGameOver = !IsContinueTakeCard;
                }
                return isGameOver;
            }

            public int HandCardsPoint { get { return PokeTools.HandCardsSum(handCards); } }
        }

        class Player : AbsPlayer
        {
            public override void GameStart()
            {
                handCards.Clear();
                Console.WriteLine("玩家整理了一下衣服，準(zhǔn)備開局；");
            }

            public override void SendCard(int card)
            {
                handCards.Add(card);
                Console.WriteLine("玩家發(fā)牌：" + PokeTools.PokerBrandByPoint(card));
            }

            public override bool TakeCard()
            {
                Console.WriteLine("當(dāng)前您的手牌點數(shù)和為：" + HandCardsPoint);
                Console.WriteLine("是否繼續(xù)取牌(Y/N)？");
                string readStr = Console.ReadLine();
                // 輸入Y取牌，其他為不取牌
                IsContinueTakeCard = readStr.Equals("Y");
                return IsContinueTakeCard;
            }
        }

        class AIPlayer : AbsPlayer
        {
            public override void GameStart()
            {
                handCards.Clear();
                Console.WriteLine("AI：清理一下內(nèi)存，與之一戰(zhàn)；");
            }

            public override void SendCard(int card)
            {
                base.SendCard(card);
                Console.WriteLine("AI發(fā)牌：" + PokeTools.PokerBrandByPoint(card));
            }

            public override bool TakeCard()
            {
                // 手牌數(shù)點數(shù)小于17，就繼續(xù)取牌
                return HandCardsPoint < 17;
            }
        }

        class Poker
        {
            List<AbsPlayer> players = new List<AbsPlayer>();
            public Action GameSratrHandler;
            public Action<int> SendCardHandler;
            public Func<int, bool> TaskCardHandler;
            // 發(fā)牌用
            List<int> sendCards;

            public Poker(List<int> cards)
            {
                // 復(fù)制一份發(fā)牌用
                sendCards = new List<int>(cards);
            }

            public void AddPlayer(AbsPlayer player)
            {
                players.Add(player);
            }

            public void GameStart()
            {
                for (int i = 0; i < players.Count; i++)
                {
                    if (!players[i].GameOver())
                    {
                        players[i].GameStart();
                    }
                }
            }

            /// <summary>
            /// 發(fā)牌 -- 會剔除已經(jīng)發(fā)過的牌
            /// </summary>
            public void SendCard()
            {
                for (int i = 0; i < players.Count; i++)
                {
                    players[i].SendCard(SendOneCard());
                }
            }

            int SendOneCard()
            {
                // 隨機發(fā)一張牌
                Random random = new Random();
                int index = random.Next(0, sendCards.Count);
                // 取到牌值
                int cardPoint = sendCards[index];
                // 從手牌中移除 --> 為避免發(fā)到相同的牌
                sendCards.RemoveAt(index);

                return cardPoint;
            }

            public void TaskCard()
            {
                for (int i = 0; i < players.Count; i++)
                {
                    // 選擇取牌后再發(fā)一張牌
                    if (players[i].TakeCard())
                    {
                        players[i].SendCard(SendOneCard());
                    }
                    Console.WriteLine($"玩家：{players[i].playerName} 手牌：{PokeTools.ShowHandCard(players[i].handCards)}");
                }

                if (!GameOver())
                {
                    TaskCard();
                }
            }

            public bool GameOver()
            {
                int playerCount = 0;
                for (int i = 0; i < players.Count; i++)
                {
                    if (!players[i].GameOver())
                    {
                        playerCount++;
                    }
                }

                bool isGameOver = playerCount <= 1;

                if (isGameOver)
                {
                    Console.WriteLine("游戲結(jié)束：");

                    List<AbsPlayer> playerList = new List<AbsPlayer>();
                    int maxPoint = 0;
                    for (int i = 0; i < players.Count; i++)
                    {
                        if (players[i].HandCardsPoint > 21)
                        {
                            Console.WriteLine($"玩家：{players[i].playerName} 爆牌了"  );
                        }
                        else
                        {
                            playerList.Add(players[i]);
                            if (maxPoint < players[i].HandCardsPoint)
                            {
                                maxPoint = players[i].HandCardsPoint;
                            }
                        }
                    }

                    if (playerList.Count == 0)
                    {
                        Console.WriteLine("平局");
                    } 
                    else if (playerList.Count == 1)
                    {

                        Console.WriteLine($"玩家：{playerList[0].playerName} 贏了");
                    }
                    else
                    {
                        for (int i = 0; i < playerList.Count; i++)
                        {
                            if (maxPoint == playerList[i].HandCardsPoint)
                            {
                                Console.WriteLine($"玩家：{playerList[i].playerName} 贏了");
                            }
                        }
                    }
                }
                return isGameOver;
            }
        }
    }

    class PokeTools
    {
        /// <summary>
        /// 根據(jù)牌點返回牌名 如：14 ->紅桃3
        /// </summary>
        /// <param name="card"></param>
        /// <returns></returns>
        public static string PokerBrandByPoint(int card)
        {
            if (card > 52 || card <= 0)
            {
                Console.WriteLine("不是撲克牌點");
                return "不是撲克牌點";
            }

            string[] flowerColor = new string[4] { "黑桃", "紅桃", "梅花", "方片" };
            string[] points = new string[13] { "K", "A", "2", "3", "4", "5", "6", "7", "8", "9", "10", "J", "Q" };
            int huaSe = (card - 1) / 13;
            int point = card % 13;

            // 返回花色 + 牌點 如：紅桃3
            return flowerColor[huaSe] + points[point];
        }

        /// <summary>
        /// 手牌求和
        /// </summary>
        /// <param name="handCards"></param>
        /// <returns></returns>
        public static int HandCardsSum(List<int> handCards)
        {
            // "K", "2", "3", "4", "5", "6", "7", "8", "9", "10", "J", "Q"
            int[] points = new int[13] { 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10, 10 };
            int sumRes = 0;

            for (int i = 0; i < handCards.Count; i++)
            {
                sumRes += points[handCards[i] % 13];
            }

            return sumRes;
        }

        // 顯示手牌
        public static (string, string) ShowHandCard(List<int> handCards)
        {
            string resStr = "";
            for (int i = 0; i < handCards.Count; i++)
            {
                resStr += PokeTools.PokerBrandByPoint(handCards[i]);
                if (handCards.Count - 1 != i)
                {
                    resStr += ",";
                }
            }

            return (resStr, "牌點和:" + PokeTools.HandCardsSum(handCards));
        }
    }
}

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