添加Lesson4

2025-10-11 19:30:38 +08:00
parent 6c30ef5c27
commit 6cc1b0d4f9
5 changed files with 211 additions and 0 deletions
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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>
@@ -0,0 +1,70 @@
+using System;
+using System.Collections;
+using System.Security.Cryptography.X509Certificates;
+using System.Threading;
+namespace Lesson4_Hashtable练习题
+{
+    //因为一般管理器都是唯一的，所以做成单例模式的对象
+    class MonsterMgr
+    {
+        private static MonsterMgr instance = new MonsterMgr();
+        private Hashtable monstersTable = new Hashtable();
+        private MonsterMgr()
+        {
+
+        }
+        public static MonsterMgr Instance
+        {
+            get
+            {
+                return instance;
+            }
+        }
+        
+        private int monsterID = 0;
+
+        public void AddMonster()
+        {
+
+            Monster monster = new Monster(monsterID);
+            Console.WriteLine("创建了怪物"+monsterID);
+            monsterID++;
+            monstersTable.Add(monster.id, monster);
+        }
+
+        public void DeleteMonster(int monsterID)
+        {
+            if (monstersTable.ContainsKey(monsterID))
+            {
+                (monstersTable[monsterID] as Monster).Dead();
+                monstersTable.Remove(monsterID);
+            }
+        }
+    }
+    class Monster
+    {
+        public int id;
+        public Monster(int id)
+        {
+            this.id = id;
+        }
+        public void Dead()
+        {
+            Console.WriteLine("怪物"+id+"死亡");
+        }
+    }
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            MonsterMgr.Instance.AddMonster();
+            MonsterMgr.Instance.AddMonster();
+            MonsterMgr.Instance.AddMonster();
+            MonsterMgr.Instance.AddMonster();
+            MonsterMgr.Instance.AddMonster();
+            MonsterMgr.Instance.DeleteMonster(0);
+            MonsterMgr.Instance.DeleteMonster(3);
+
+        }
+    }
+}