贪吃蛇小项目

C#核心/test/Program.cs

@@ -1,25 +1,55 @@
-// See https://aka.ms/new-console-template for more information
-Console.WriteLine("Hello, World!");
-#region 知识点一 
-#endregion
+using System;
+namespace Test
+{
+    enum E_RoomType
+    {
+        Bedroom,
+        LivingRoom
+    }
+    class Bedroom : IChangeRoom
+    {
+        public void ChangeRoom()
+        {
+            Console.WriteLine("卧室");
+        }
+    }
+    class LivingRoom : IChangeRoom
+    {
+        public void ChangeRoom()
+        {
+            Console.WriteLine("客厅");
+        }
+    }
+    interface IChangeRoom
+    {
+        void ChangeRoom() { }
+    }
+    class Show
+    {
+        IChangeRoom room;
+        public Show()
+        {
+            room = new Bedroom();
+        }
+        public Show(IChangeRoom room)
+        {
+            this.room = room;
+        }
+        public void ShowRoom()
+        {
+            room.ChangeRoom();
+        }
 
-#region 知识点二 
-#endregion
-
-#region 知识点三 
-#endregion
-
-#region 知识点四 
-#endregion
-
-#region 知识点五 
-#endregion
-
-#region 知识点六 
-#endregion
-
-#region 知识点七 
-#endregion
-
-#region 知识点八 
-#endregion
+    }
+    
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            Show s1 = new Show();
+            Show s2 = new Show(new LivingRoom());
+            s1.ShowRoom();
+            s2.ShowRoom();
+        }
+    }
+}

C#核心实践/C#核心实践.sln

@@ -1,7 +1,7 @@
 
 Microsoft Visual Studio Solution File, Format Version 12.00
 # Visual Studio Version 17
-VisualStudioVersion = 17.14.36202.13 d17.14
+VisualStudioVersion = 17.14.36202.13
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "必备知识点_多脚本文件", "必备知识点_多脚本文件\必备知识点_多脚本文件.csproj", "{20F6B501-8D7E-468E-9D92-B0ACC81D217B}"
 EndProject
@@ -9,6 +9,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "必备知识点_UML类图",
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "必备知识点_面向对象七大原则", "必备知识点_面向对象七大原则\必备知识点_面向对象七大原则.csproj", "{6379831D-2766-4714-A82E-1072023A574F}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "贪吃蛇", "贪吃蛇\贪吃蛇.csproj", "{B3D215DA-A41B-4CBE-B572-1FD94BF0239F}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -27,6 +29,10 @@ Global
 		{6379831D-2766-4714-A82E-1072023A574F}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{6379831D-2766-4714-A82E-1072023A574F}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{6379831D-2766-4714-A82E-1072023A574F}.Release|Any CPU.Build.0 = Release|Any CPU
+		{B3D215DA-A41B-4CBE-B572-1FD94BF0239F}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{B3D215DA-A41B-4CBE-B572-1FD94BF0239F}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{B3D215DA-A41B-4CBE-B572-1FD94BF0239F}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{B3D215DA-A41B-4CBE-B572-1FD94BF0239F}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

C#核心实践/贪吃蛇/Lesson1/Game.cs

@@ -0,0 +1,78 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace 贪吃蛇
+{
+    class Game
+    {
+        //窗口宽高
+        public const int h = 20;
+        public const int w = 80;
+        //当前游戏场景
+        public static ISceneUpdate nowScene;
+
+        public Game()
+        {
+            Console.CursorVisible = false;
+            Console.SetWindowSize(w, h);
+            Console.SetBufferSize(w, h);
+
+            ChangeScene(E_Scene.Begin);//初始场景为开始场景
+        }
+        public void Start()
+        {
+            //游戏主循环
+            while (true)
+            {
+                try
+                {
+                    if (nowScene != null)
+                    {
+                        nowScene.Update();//场景不为空就更新场景
+                    }
+                }
+                catch
+                {
+
+                }
+            }
+        }
+        public static void ChangeScene(E_Scene type)
+        {
+            //切场景时先擦除上一次绘制的内容
+            Console.Clear();
+            switch (type)
+            {
+                case E_Scene.Begin:
+                    nowScene = new BeginScene();
+                    break;
+                case E_Scene.Game:
+                    nowScene = new GameScene();
+                    break;
+                case E_Scene.End:
+                    nowScene = new EndScene();
+                    break;
+                default:
+                    break;
+            }
+        }
+    }
+    enum E_Scene
+    {
+        /// <summary>
+        /// 开始场景
+        /// </summary>
+        Begin,
+        /// <summary>
+        /// 游戏场景
+        /// </summary>
+        Game,
+        /// <summary>
+        /// 结束场景
+        /// </summary>
+        End,
+    }//游戏场景枚举
+}

C#核心实践/贪吃蛇/Lesson1/ISceneUpdate.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace 贪吃蛇
+{
+    /// <summary>
+    /// 场景更新接口
+    /// </summary>
+    interface ISceneUpdate
+    {
+        void Update()
+        {
+        }
+    }
+}

C#核心实践/贪吃蛇/Lesson2/BaseScene.cs

@@ -0,0 +1,48 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace 贪吃蛇
+{
+    abstract class BaseScene : ISceneUpdate
+    {
+        protected int nowSceneIndex = 0;
+        protected string title;
+        protected string str1;
+
+        public abstract void PressEnter();
+        public void Update()
+        {
+            //要完成的内容：绘制开始和结束场景，并完成切换选择功能
+            Console.ForegroundColor = ConsoleColor.White;
+
+            //绘制标题
+            Console.SetCursorPosition(Game.w / 2 - title.Length, 5);
+            Console.Write(title);
+
+            //绘制选项
+            Console.SetCursorPosition(Game.w / 2 - str1.Length, 8);
+            Console.ForegroundColor = nowSceneIndex == 0 ? ConsoleColor.Red : ConsoleColor.White;
+            Console.Write(str1);
+
+            Console.SetCursorPosition(Game.w / 2 - 4, 10);
+            Console.ForegroundColor = nowSceneIndex == 1 ? ConsoleColor.Red : ConsoleColor.White;
+            Console.Write("结束游戏");
+            //根据nowSceneIndex绘制wsj选中的索引
+            switch (Console.ReadKey(true).Key)
+            {
+                case ConsoleKey.W:
+                    nowSceneIndex = 0;
+                    break;
+                case ConsoleKey.S:
+                    nowSceneIndex = 1;
+                    break;
+                case ConsoleKey.Enter:
+                    PressEnter();
+                    break;
+            }
+        }
+    }
+}

C#核心实践/贪吃蛇/Lesson2/BeginScene.cs

@@ -0,0 +1,31 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace 贪吃蛇
+{
+    class BeginScene : BaseScene
+    {
+        public BeginScene()
+        {
+            title = "贪吃蛇小游戏";
+            str1 = "开始游戏";
+        }
+        public override void PressEnter()
+        {
+            //根据nowSceneIndex的值决定按下回车后做什么
+            if( nowSceneIndex == 0 )
+            {
+                //切换到开始游戏
+                Game.ChangeScene(E_Scene.Game);
+            }
+            else
+            {
+                //结束游戏
+                Environment.Exit(0);
+            }
+        }
+    }
+}

C#核心实践/贪吃蛇/Lesson2/EndScene.cs

@@ -0,0 +1,32 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Security.Cryptography.X509Certificates;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace 贪吃蛇
+{
+    class EndScene : BaseScene
+    {
+        public EndScene()
+        {
+            title = "游戏结束";
+            str1 = "重新开始";
+        }
+        public override void PressEnter()
+        {
+            //根据nowSceneIndex的值决定按下回车后做什么
+            if (nowSceneIndex == 0)
+            {
+                //切换到开始游戏
+                Game.ChangeScene(E_Scene.Begin);
+            }
+            else
+            {
+                //结束游戏
+                Environment.Exit(0);
+            }
+        }
+    }
+}

C#核心实践/贪吃蛇/Lesson2/GameScene.cs

@@ -0,0 +1,65 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace 贪吃蛇
+{
+    class GameScene : ISceneUpdate
+    {
+        Map map;
+        Snake snake;
+        Food food;
+        public GameScene()
+        {
+            map = new Map();
+            snake = new Snake(40, 10);
+            food = new Food(snake);
+        }
+        public void Update()
+        {
+            
+            map.Draw();//画地图
+            food.Draw();//画食物
+            snake.Move();//让蛇动起来
+            snake.Draw();//画蛇 
+            if (snake.CheckEnd(map))//检测游戏是否结束
+            {
+                Game.ChangeScene(E_Scene.End);
+            }
+            snake.CheckEat(food);//检测蛇是否吃到食物
+            Thread.Sleep(200);//控制蛇的移动速度
+            //检测用户输入
+            if (Console.KeyAvailable)//Console.KeyAvailable的作用是：如果有按键输入才返回Ture，防止卡住
+            {
+                switch (Console.ReadKey(true).Key)
+                {
+                    case ConsoleKey.W:
+                    case ConsoleKey.UpArrow:
+                        snake.ChangeDirection(E_MoveDirection.Up);
+                        //向上
+                        break;
+                    case ConsoleKey.S:
+                    case ConsoleKey.DownArrow:
+                        snake.ChangeDirection(E_MoveDirection.Down);
+                        //向下
+                        break;
+                    case ConsoleKey.A:
+                    case ConsoleKey.LeftArrow:
+                        snake.ChangeDirection(E_MoveDirection.Left);
+                        //向左
+                        break;
+                    case ConsoleKey.D:
+                    case ConsoleKey.RightArrow:
+                        snake.ChangeDirection(E_MoveDirection.Right);
+                        //向右
+                        break;
+                    default:
+                        break;
+                }
+            }
+            
+        }
+    }
+}

C#核心实践/贪吃蛇/Lesson3/GameObject.cs

@@ -0,0 +1,19 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace 贪吃蛇
+{
+    abstract class GameObject : IDraw
+    {
+        //当前位置
+        public Position pos; 
+
+        //绘制对象
+        //可以继承接口后，把接口中的方法变成抽象方法，让子类去实现
+        //因为时抽象行为，所以子类必须实现
+        public abstract void Draw();
+    }
+}

C#核心实践/贪吃蛇/Lesson3/IDraw.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace 贪吃蛇
+{
+    interface IDraw
+    {
+        void Draw();
+    }
+}

C#核心实践/贪吃蛇/Lesson3/Position.cs

@@ -0,0 +1,28 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace 贪吃蛇
+{
+    struct Position
+    {
+        public int x;
+        public int y;
+        public Position(int x, int y)
+        {
+            this.x = x;
+            this.y = y;
+        }
+        //重载==和!=运算符来判断两个Position是否相等
+        public static bool operator == (Position p1, Position p2)
+        {
+            return p1.x == p2.x && p1.y == p2.y;
+        }
+        public static bool operator !=(Position p1, Position p2)
+        {
+            return !(p1 == p2);
+        }
+    }
+}

C#核心实践/贪吃蛇/Lesson4/Food.cs

@@ -0,0 +1,36 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace 贪吃蛇
+{
+    class Food : GameObject
+    {
+        public Food(Snake snake)
+        {
+            RandomPos(snake);
+        }
+        public override void Draw()
+        {
+            Console.ForegroundColor = ConsoleColor.Cyan;
+            Console.SetCursorPosition(pos.x, pos.y);
+            Console.Write("◎");
+        }
+        public void RandomPos(Snake snake)
+        {
+            Random r = new Random();
+            int x = r.Next(1, Game.w / 2 - 1) * 2; //1-38的随机数
+            int y = r.Next(2, Game.h - 3); //1-18的随机数
+            pos = new Position(x, y);
+            //判断生成的位置是否和蛇身重合
+            if (snake.CheckSamePos(pos))
+            {
+                 RandomPos(snake);
+            }
+
+        }
+        
+    }
+}

C#核心实践/贪吃蛇/Lesson4/SnakeBody.cs

@@ -0,0 +1,29 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace 贪吃蛇
+{
+    enum E_BodyType
+    {
+        Head, //蛇头
+        Body, //蛇身
+    }
+    class SnakeBody : GameObject
+    {
+        private E_BodyType bodyType; //身体类型
+        public SnakeBody(int x, int y, E_BodyType bodyType)
+        {
+            pos = new Position(x, y);
+            this.bodyType = bodyType;
+        }
+        public override void Draw()
+        {
+            Console.SetCursorPosition(pos.x, pos.y);
+            Console.ForegroundColor = bodyType == E_BodyType.Head ? ConsoleColor.Yellow : ConsoleColor.Green;
+            Console.Write(bodyType == E_BodyType.Head ? "●" : "○");
+        }
+    }
+}

C#核心实践/贪吃蛇/Lesson4/Wall.cs

@@ -0,0 +1,22 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace 贪吃蛇
+{
+    class Wall : GameObject
+    {
+        public Wall(int x, int y)
+        {
+            pos = new Position(x, y);
+        }
+        public override void Draw()
+        {
+            Console.ForegroundColor = ConsoleColor.Red;
+            Console.SetCursorPosition(pos.x, pos.y);
+            Console.Write("■");
+        }
+    }
+}

C#核心实践/贪吃蛇/Lesson5/Map.cs

@@ -0,0 +1,49 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace 贪吃蛇
+{
+    class Map : IDraw
+    {
+        public Wall[] walls; //存放墙位置的数组
+
+        public Map()
+        {
+            //初始化墙
+            walls = new Wall[Game.w + (Game.h -3) * 2];
+            int index = 0;
+            //上边墙
+            for (int x = 0; x < Game.w; x+=2)
+            {
+                walls[index++] = new Wall(x, 0);
+            }
+            //下边墙
+            for (int x = 0; x < Game.w; x+=2)
+            {
+                walls[index++] = new Wall(x, Game.h - 2);
+            }
+            //左边墙
+            for (int y = 1; y < Game.h - 2; y++)
+            {
+                walls[index++] = new Wall(0, y);
+            }
+            //右边墙
+            for (int y = 1; y < Game.h - 2; y++)
+            {
+                walls[index++] = new Wall(Game.w - 2, y);
+            }
+        }
+
+        public void Draw()
+        {
+            for (int x = 0; x < walls.Length; x++)
+            {
+                walls[x].Draw();
+
+            }
+        }
+    }
+}

C#核心实践/贪吃蛇/Lesson6/Snake.cs

@@ -0,0 +1,141 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace 贪吃蛇
+{
+    enum E_MoveDirection
+    {
+        Up,
+        Down,
+        Left,
+        Right
+    }
+    class Snake : IDraw
+    {
+        E_MoveDirection moveDirection;//记录蛇当前的移动方向
+        SnakeBody[] bodies; //存放蛇身体的数组
+        int nowNum;//用一个变量记录蛇的长度
+        public Snake(int x, int y)
+        {
+            moveDirection = E_MoveDirection.Right;
+            bodies = new SnakeBody[200];
+            bodies[0] = new SnakeBody(x, y, E_BodyType.Head);
+            nowNum = 1;
+        }
+        public void Draw()
+        {
+            //只画出当前的蛇身
+            for (int i = 0; i < nowNum; i++)
+            {
+                bodies[i].Draw();
+            }
+
+        }
+
+        #region Lesson7
+        //蛇的移动
+        public void Move()
+        {
+            //移动前擦除前一个位置
+            SnakeBody lastBody = bodies[nowNum - 1];
+            Console.SetCursorPosition(lastBody.pos.x, lastBody.pos.y);
+            Console.Write("  ");
+
+            for(int i = nowNum - 1; i > 0; i--)
+            {
+                bodies[i].pos = bodies[i - 1].pos;
+            }
+            switch (moveDirection)
+            {
+                case E_MoveDirection.Up:
+                    bodies[0].pos.y--;
+                    break;
+                case E_MoveDirection.Down:
+                    bodies[0].pos.y++;
+                    break;
+                case E_MoveDirection.Left:
+                    bodies[0].pos.x -= 2;
+                    break;
+                case E_MoveDirection.Right:
+                    bodies[0].pos.x += 2;
+                    break;
+            }
+        }
+        #endregion
+
+        #region Lesson8
+        public void ChangeDirection(E_MoveDirection newDirection)
+        {
+            //不能直接掉头
+            if ( newDirection == moveDirection || 
+                nowNum > 1 && (moveDirection == E_MoveDirection.Right && newDirection == E_MoveDirection.Left ) ||
+                nowNum > 1 && (moveDirection == E_MoveDirection.Left && newDirection == E_MoveDirection.Right) ||
+                nowNum > 1 && (moveDirection == E_MoveDirection.Up && newDirection == E_MoveDirection.Down) ||
+                nowNum > 1 && (moveDirection == E_MoveDirection.Down && newDirection == E_MoveDirection.Up) )
+            {
+                return;
+            }
+            moveDirection = newDirection;
+        }
+        #endregion
+
+        #region Lesson9
+        //碰撞检测
+        public bool CheckEnd(Map map)
+        {
+            //是否和墙体位置重合
+            for(int i = 0; i < map.walls.Length; i++)
+            {
+                if (bodies[0].pos == map.walls[i].pos)
+                {
+                    return true;
+                }
+            }
+            //是否和自己身体位置重合
+            for(int i = 1; i < nowNum; i++)
+            {
+                if (bodies[0].pos == bodies[i].pos)
+                {
+                    return true;
+                }
+            }
+            return false;
+        }
+        #endregion
+
+        #region Lesson10    
+        public bool CheckSamePos(Position p)
+        {
+            for(int i = 0; i < nowNum; i++)
+            {
+                if (bodies[i].pos == p)
+                {
+                    return true;
+                }
+            }
+            return false;
+        }
+        public void CheckEat(Food food)
+        {
+            if (bodies[0].pos == food.pos)
+            {
+                //吃到了就再次随机生成食物，并且让蛇变长
+                food.RandomPos(this);
+                GrowUp();
+            }
+        }
+        #endregion
+
+        #region Lesson11
+        private void GrowUp()
+        {
+            SnakeBody lastBody = bodies[nowNum - 1];
+            bodies[nowNum] = new SnakeBody(lastBody.pos.x, lastBody.pos.y, E_BodyType.Body);
+            nowNum++;
+        }
+        #endregion
+    }
+}

C#核心实践/贪吃蛇/Program.cs

@@ -0,0 +1,11 @@
+namespace 贪吃蛇
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            Game game = new Game();
+            game.Start();
+        }
+    }
+}

C#核心实践/贪吃蛇/贪吃蛇.csproj

@@ -0,0 +1,14 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <Folder Include="Lesson7\" />
+  </ItemGroup>
+
+</Project>