添加Lesson16

C#核心/C#核心.sln

@@ -27,6 +27,10 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Lesson15_继承-万物之
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Lesson15_继承-万物之父和装箱拆箱练习", "Lesson15_继承-万物之父和装箱拆箱练习\Lesson15_继承-万物之父和装箱拆箱练习.csproj", "{FD313E4D-09E3-4310-B001-8BD9BF0B7C45}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Lesson16_继承-密封类", "Lesson16_继承-密封类\Lesson16_继承-密封类.csproj", "{C68D86B1-87E3-47FC-BF5B-B9B39E1B0BD1}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Lesson16_继承-密封类练习", "Lesson16_继承-密封类练习\Lesson16_继承-密封类练习.csproj", "{673FABF2-99A7-4E63-B1F6-37AB53B6EC85}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -81,6 +85,14 @@ Global
 		{FD313E4D-09E3-4310-B001-8BD9BF0B7C45}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{FD313E4D-09E3-4310-B001-8BD9BF0B7C45}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{FD313E4D-09E3-4310-B001-8BD9BF0B7C45}.Release|Any CPU.Build.0 = Release|Any CPU
+		{C68D86B1-87E3-47FC-BF5B-B9B39E1B0BD1}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{C68D86B1-87E3-47FC-BF5B-B9B39E1B0BD1}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{C68D86B1-87E3-47FC-BF5B-B9B39E1B0BD1}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{C68D86B1-87E3-47FC-BF5B-B9B39E1B0BD1}.Release|Any CPU.Build.0 = Release|Any CPU
+		{673FABF2-99A7-4E63-B1F6-37AB53B6EC85}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{673FABF2-99A7-4E63-B1F6-37AB53B6EC85}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{673FABF2-99A7-4E63-B1F6-37AB53B6EC85}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{673FABF2-99A7-4E63-B1F6-37AB53B6EC85}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

C#核心/Lesson16_继承-密封类/Lesson16_继承-密封类.csproj

@@ -0,0 +1,11 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <RootNamespace>Lesson16_继承_密封类</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

C#核心/Lesson16_继承-密封类/Program.cs

@@ -0,0 +1,34 @@
+namespace Lesson16_继承_密封类
+{
+
+    #region 知识点一 基本概念
+    //密封类 是使用 sealed密封关键字修饰的类
+    //作用：让类无法再被继承
+    #endregion
+
+    #region 知识点二 实例
+    class Father
+    {
+
+    }
+
+    sealed class Son : Father//之后无法再被继承
+    {
+
+    }
+    #endregion
+
+    #region 知识点三 作用
+    //在目前的程序设计中，密封类的主要作用就是不允许最底层子类被继承
+    //可以保证程序的规范性
+    //目前对于我们来说 可能用处不大
+    #endregion
+
+    internal class Program
+    {
+        static void Main(string[] args)
+        {
+            Console.WriteLine("Hello, World!");
+        }
+    }
+}

C#核心/Lesson16_继承-密封类练习/Lesson16_继承-密封类练习.csproj

@@ -0,0 +1,11 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <RootNamespace>Lesson16_继承_密封类练习</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>

C#核心/Lesson16_继承-密封类练习/Program.cs

@@ -0,0 +1,104 @@
+namespace Lesson16_继承_密封类练习
+{
+    class Vehicle
+    {
+        public int speed;
+        public int maxSpeed;
+        public int maxCapacity;
+        public int nowMemberindex;
+
+        public Human[] passenger;
+
+        public Vehicle(int speed, int maxSpeed, int maxCapacity)
+        {
+            this.speed = speed;
+            this.maxSpeed = maxSpeed;
+            this.nowMemberindex = 0;
+            this.maxCapacity = maxCapacity;
+            passenger = new Human[maxCapacity];
+        }
+
+        public void GetOn(Human p)
+        {
+            if (nowMemberindex >= maxCapacity)
+            {
+                Console.WriteLine("乘客已满");
+                return;
+            }
+            else
+            {
+                Console.WriteLine("已上车");
+                passenger[nowMemberindex] = p;
+                nowMemberindex++;
+            }
+            
+        }
+
+        public void GetOff(Human p)
+        {
+            for (int i = 0; i < nowMemberindex; i++) 
+            {
+                if (passenger[i] == p)
+                {
+                    for (int j = i; j < nowMemberindex - 1; j++)
+                    {
+                        passenger[j] = passenger[j + 1];
+                    }
+                    passenger[nowMemberindex - 1] = null;
+                    nowMemberindex--;
+                    Console.WriteLine("已下车一位成员");
+                    break;
+                }
+            }
+        }
+
+        public void Moving()
+        {
+
+        }
+
+        public void Accident()
+        {
+
+        }
+    }
+    class Human
+    {
+
+    }
+    class Driver : Human
+    {
+
+    }
+    class Passenger : Human
+    {
+        public int age;
+        public string name;
+        public Passenger()
+        {
+
+        }
+        public Passenger(int age,string name)
+        {
+            this.age = age;
+            this.name = name;
+        }
+    }
+    internal class Program
+    {
+        static void Main(string[] args)
+        {
+            Console.WriteLine("Hello, World!");
+            Human h1 = new Passenger(1,"h1");
+            Human h2 = new Passenger(2,"h2");
+            Human h3 = new Passenger(3,"h3");
+            Vehicle Car = new Vehicle(20,200,2);
+            Car.GetOn(h1);
+            Car.GetOn(h2);
+            Car.GetOn(h3);
+            Car.GetOff(h1);
+            Car.GetOn(h3);
+            Car.GetOff(h3);
+        }
+    }
+}