diff --git "a/\347\254\2541\346\254\241\344\275\234\344\270\232/5.20\344\275\234\344\270\232\343\200\201/npc/IronNPC.cs" "b/\347\254\2541\346\254\241\344\275\234\344\270\232/5.20\344\275\234\344\270\232\343\200\201/npc/IronNPC.cs"
new file mode 100644
index 0000000000000000000000000000000000000000..d9759b176197830c4e460c8782ccf13cdea1730f
--- /dev/null
+++ "b/\347\254\2541\346\254\241\344\275\234\344\270\232/5.20\344\275\234\344\270\232\343\200\201/npc/IronNPC.cs"
@@ -0,0 +1,47 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ConsoleApp1
+{
+    class IronNPC : NPC
+    {
+        private string hqq;
+        public string Hqq
+        {
+            get { return this.hqq; }
+            set { this.hqq = value; }
+        }
+        public IronNPC() { }
+        public IronNPC(string name, Npctype type, string hqq) : base(name, type)
+        {
+            this.hqq = hqq;
+
+        }
+
+        public override void Speak()
+        {
+            Console.WriteLine();
+        }
+        public void xb(string task)
+        {
+            Console.WriteLine($"我是修补NPC，给你一个任务：{task}");
+
+        }
+        public void qh(string task)
+        {
+            Console.WriteLine($"我是强化NPC，给你一个任务：{task}");
+
+        }
+        public void dz(string task)
+        {
+            Console.WriteLine($"我是打造NPC，给你一个任务：{task}");
+
+        }
+
+
+    }
+  }
+
diff --git "a/\347\254\2541\346\254\241\344\275\234\344\270\232/5.20\344\275\234\344\270\232\343\200\201/npc/Npc.cs" "b/\347\254\2541\346\254\241\344\275\234\344\270\232/5.20\344\275\234\344\270\232\343\200\201/npc/Npc.cs"
new file mode 100644
index 0000000000000000000000000000000000000000..8b513eb72a91c1f5e4e6a7af8d0cb8f760721e47
--- /dev/null
+++ "b/\347\254\2541\346\254\241\344\275\234\344\270\232/5.20\344\275\234\344\270\232\343\200\201/npc/Npc.cs"
@@ -0,0 +1,39 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ConsoleApp1
+{
+    enum Npctype
+    {
+        Task,//任务类型
+        Shop,//商贩类型
+        Iron,//铁匠类型
+    }
+    abstract class NPC
+    {
+        private string name;
+        private Npctype type;
+
+        public string Name
+        {
+            get { return this.name; }
+            set { this.name = value; }
+        }
+        public Npctype Type
+        {
+            get { return this.type; }
+            set { this.type = value; }
+        }
+        public NPC(string name, Npctype type)
+        {
+            this.name = name;
+            this.type = type;
+        }
+
+        public NPC() { }
+        public abstract void Speak();
+    }
+}
diff --git "a/\347\254\2541\346\254\241\344\275\234\344\270\232/5.20\344\275\234\344\270\232\343\200\201/npc/Program.cs" "b/\347\254\2541\346\254\241\344\275\234\344\270\232/5.20\344\275\234\344\270\232\343\200\201/npc/Program.cs"
new file mode 100644
index 0000000000000000000000000000000000000000..f3c7037bf0a59c5bc85c91236bab69863c2379f6
--- /dev/null
+++ "b/\347\254\2541\346\254\241\344\275\234\344\270\232/5.20\344\275\234\344\270\232\343\200\201/npc/Program.cs"
@@ -0,0 +1,28 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ConsoleApp1
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            IronNPC i = new IronNPC();
+            i.Speak();
+            i.xb("任务1");
+            i.qh("任务2");
+            i.dz("任务3");
+            TaskNPC z = new TaskNPC();
+            z.sx("任务4");
+            z.dg("任务5");
+            z.cj("任务6");
+            ShopNPC s = new ShopNPC();
+            s.wq("任务7");
+            s.cl("任务8");
+            s.sw("任务9");
+        }
+    }
+}
diff --git "a/\347\254\2541\346\254\241\344\275\234\344\270\232/5.20\344\275\234\344\270\232\343\200\201/npc/ShopNPC.cs" "b/\347\254\2541\346\254\241\344\275\234\344\270\232/5.20\344\275\234\344\270\232\343\200\201/npc/ShopNPC.cs"
new file mode 100644
index 0000000000000000000000000000000000000000..0441d172a37cfc791e6d78cdc74b5aa165329895
--- /dev/null
+++ "b/\347\254\2541\346\254\241\344\275\234\344\270\232/5.20\344\275\234\344\270\232\343\200\201/npc/ShopNPC.cs"
@@ -0,0 +1,45 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ConsoleApp1
+{
+    class ShopNPC : NPC
+    {
+        private string item;
+        public string Item
+        {
+            get => item;
+            set => item = value;
+        }
+        public ShopNPC() { }
+        public ShopNPC(string name, Npctype type, string item) : base(name, type)
+        {
+            this.item = item;
+
+        }
+        
+        public override void Speak()
+        {
+            Console.WriteLine("NPC:{0},我在贩卖{1}商品", this.Name, this.item);
+        }
+        public void wq(string task)
+        {
+            Console.WriteLine($"我是武器NPC，给你一个任务：{task}");
+
+        }
+        public void cl(string task)
+        {
+            Console.WriteLine($"我是材料NPC，给你一个任务：{task}");
+
+        }
+        public void sw(string task)
+        {
+            Console.WriteLine($"我是食物NPC，给你一个任务：{task}");
+
+        }
+    }
+
+}
diff --git "a/\347\254\2541\346\254\241\344\275\234\344\270\232/5.20\344\275\234\344\270\232\343\200\201/npc/TaskNPC.cs" "b/\347\254\2541\346\254\241\344\275\234\344\270\232/5.20\344\275\234\344\270\232\343\200\201/npc/TaskNPC.cs"
new file mode 100644
index 0000000000000000000000000000000000000000..72a46404724bdfbde748170eb9c366fe697d3057
--- /dev/null
+++ "b/\347\254\2541\346\254\241\344\275\234\344\270\232/5.20\344\275\234\344\270\232\343\200\201/npc/TaskNPC.cs"
@@ -0,0 +1,38 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ConsoleApp1
+{
+    class TaskNPC : NPC
+    {
+        private string taskInfo;
+
+        public TaskNPC() { }
+        public TaskNPC(string name, Npctype type, string taskInfo) : base(name, type)
+        {
+            this.taskInfo = taskInfo;
+        }
+        public override void Speak()
+        {
+            Console.WriteLine("哇，你来了，我正需要帮助，你可以帮助我吗？");
+            Console.WriteLine("NPC:{0}，任务：{1}", base.Name, this.taskInfo);
+        }
+        public void sx(string task)
+        {
+            Console.WriteLine($"我是送信NPC，给你一个任务：{task}");
+
+        }
+        public void dg(string task)
+        {
+            Console.WriteLine($"我是打怪NPC，给你一个任务：{task}");
+
+        }
+        public void cj(string task)
+        {
+            Console.WriteLine($"我是采集NPC，给你一个任务：{task}");
+        }
+    }
+}
diff --git "a/\347\254\2541\346\254\241\344\275\234\344\270\232/5.20\344\275\234\344\270\232\343\200\201/\346\234\272\345\231\250\344\272\272/CookRobot.cs" "b/\347\254\2541\346\254\241\344\275\234\344\270\232/5.20\344\275\234\344\270\232\343\200\201/\346\234\272\345\231\250\344\272\272/CookRobot.cs"
new file mode 100644
index 0000000000000000000000000000000000000000..cc91fb823483f5eb5bc7f582e7e2e1932b82a088
--- /dev/null
+++ "b/\347\254\2541\346\254\241\344\275\234\344\270\232/5.20\344\275\234\344\270\232\343\200\201/\346\234\272\345\231\250\344\272\272/CookRobot.cs"
@@ -0,0 +1,34 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace W1
+{
+    enum Cook
+    {
+        扬州炒饭,
+        水煮肥牛,
+        爆炒小龙虾
+    }
+    class CookRobot : Robot
+    {
+        private Cook ck;
+
+        public Cook Ck
+        {
+            get { return this.ck; }
+            set { this.ck = value; }
+
+        }
+        public CookRobot(string name, Cook ck) : base(name)
+        {
+            this.ck = ck;
+        }
+        public override void Working()
+        {
+            Console.WriteLine("{0}正在做{1}", this.name, this.ck);
+        }
+    }
+}
diff --git "a/\347\254\2541\346\254\241\344\275\234\344\270\232/5.20\344\275\234\344\270\232\343\200\201/\346\234\272\345\231\250\344\272\272/DeliveryRobot.cs" "b/\347\254\2541\346\254\241\344\275\234\344\270\232/5.20\344\275\234\344\270\232\343\200\201/\346\234\272\345\231\250\344\272\272/DeliveryRobot.cs"
new file mode 100644
index 0000000000000000000000000000000000000000..77131fba9aa0245151ac46c925387fed1621b939
--- /dev/null
+++ "b/\347\254\2541\346\254\241\344\275\234\344\270\232/5.20\344\275\234\344\270\232\343\200\201/\346\234\272\345\231\250\344\272\272/DeliveryRobot.cs"
@@ -0,0 +1,29 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace W1
+{
+    class DeliveryRobot : Robot
+    {
+        private int hours;
+
+        public int Hours
+        {
+            get { return this.hours; }
+            set { this.hours = value; }
+        }
+
+
+        public DeliveryRobot(string name, int hours) : base(name)
+        {
+            this.hours = hours;
+        }
+        public override void Working()
+        {
+            Console.WriteLine("{0}连续工作时长为{1}分钟", this.name, this.hours);
+        }
+    }
+}
diff --git "a/\347\254\2541\346\254\241\344\275\234\344\270\232/5.20\344\275\234\344\270\232\343\200\201/\346\234\272\345\231\250\344\272\272/Program.cs" "b/\347\254\2541\346\254\241\344\275\234\344\270\232/5.20\344\275\234\344\270\232\343\200\201/\346\234\272\345\231\250\344\272\272/Program.cs"
new file mode 100644
index 0000000000000000000000000000000000000000..21cbabb57cf47d709a893092826514b7ebf1672b
--- /dev/null
+++ "b/\347\254\2541\346\254\241\344\275\234\344\270\232/5.20\344\275\234\344\270\232\343\200\201/\346\234\272\345\231\250\344\272\272/Program.cs"
@@ -0,0 +1,45 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace W1
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            //            编写一个程序，以实现机器人的层次结构，此层次结构将至少包含抽象类机器人类Robot、炒菜机器人类CookRobot、传菜机器人类DeliveryRobot。
+            //Robot类应包含机器人姓名name字段、机器人工作的方法Working()，该方法应该在子类中被实现，机器人工作的方式很多，所以Working()方法应该被定义为抽象方法。
+
+            //可以在CookRobot中添加一个代表菜的类型的字段，用枚举类型；在DeliveryRobot中添加一个代表连续工作时长的字段hours。
+            //CookRobot和DeliveryRobot应实现具体的Working()方法。
+
+            //在主类中定义一个方法，形参数据类型是string，返回值数据类型是Robot，方法中实现如果传入的字符串是“炒菜”，那就返回CookRobot的实例（当然是要用Robot的引用指向的），如果传入的字符串是“传菜”，那就返回DeliveryRobot的实例。
+
+            //Main方法中：用户输入所选择的机器人的功能，根据用户的输入Robot执行对应的功能。
+            Console.WriteLine("请输入炒菜 或 传菜");
+            string c = Console.ReadLine();
+            Tect(c);
+
+        }
+        static void Tect(string c)
+        {
+            switch (c)
+            {
+                case "传菜":
+                    Robot d = new DeliveryRobot("摸鱼人", 10);
+                    d.Working();
+                    break;
+                case "炒菜":
+                    Robot r = new CookRobot("摸鱼人", Cook.爆炒小龙虾);
+                    r.Working();
+                    break;
+                default:
+                    break;
+
+            }
+        }
+    }
+}
diff --git "a/\347\254\2541\346\254\241\344\275\234\344\270\232/5.20\344\275\234\344\270\232\343\200\201/\346\234\272\345\231\250\344\272\272/Robot.cs" "b/\347\254\2541\346\254\241\344\275\234\344\270\232/5.20\344\275\234\344\270\232\343\200\201/\346\234\272\345\231\250\344\272\272/Robot.cs"
new file mode 100644
index 0000000000000000000000000000000000000000..53f20ca9d159428e68cfeecb872a11ff5b51ea96
--- /dev/null
+++ "b/\347\254\2541\346\254\241\344\275\234\344\270\232/5.20\344\275\234\344\270\232\343\200\201/\346\234\272\345\231\250\344\272\272/Robot.cs"
@@ -0,0 +1,25 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace W1
+{
+    abstract class Robot
+    {
+        protected string name;
+
+        public string Nmae
+        {
+            get { return this.name; }
+            set { this.name = value; }
+        }
+
+        public Robot(string name)
+        {
+            this.name = name;
+        }
+        public abstract void Working();
+    }
+}