From 372d55923a16e0e55cbf887d5cceee73743ca8a8 Mon Sep 17 00:00:00 2001
From: Kister Hakusan <2753888203@qq.com>
Date: Sun, 14 Sep 2025 16:31:09 +0800
Subject: [PATCH] =?UTF-8?q?=E6=B7=BB=E5=8A=A0Lesson19?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
---
C#核心/C#核心.sln | 12 ++
.../Lesson19_多态-接口.csproj | 11 +
C#核心/Lesson19_多态-接口/Program.cs | 189 ++++++++++++++++++
.../Lesson19_多态-接口练习.csproj | 11 +
C#核心/Lesson19_多态-接口练习/Program.cs | 185 +++++++++++++++++
5 files changed, 408 insertions(+)
create mode 100644 C#核心/Lesson19_多态-接口/Lesson19_多态-接口.csproj
create mode 100644 C#核心/Lesson19_多态-接口/Program.cs
create mode 100644 C#核心/Lesson19_多态-接口练习/Lesson19_多态-接口练习.csproj
create mode 100644 C#核心/Lesson19_多态-接口练习/Program.cs
diff --git a/C#核心/C#核心.sln b/C#核心/C#核心.sln
index 37b3e4d..316178c 100644
--- a/C#核心/C#核心.sln
+++ b/C#核心/C#核心.sln
@@ -39,6 +39,10 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Lesson18_多态-抽象类
EndProject
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Lesson18_多态-抽象类和抽象方法练习", "Lesson18_多态-抽象类和抽象方法练习\Lesson18_多态-抽象类和抽象方法练习.csproj", "{7004726B-5B33-4B2A-ADDB-EF22DA593630}"
EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Lesson19_多态-接口", "Lesson19_多态-接口\Lesson19_多态-接口.csproj", "{FC39DDE9-AC80-40A2-9CCA-DC06510A8881}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Lesson19_多态-接口练习", "Lesson19_多态-接口练习\Lesson19_多态-接口练习.csproj", "{D511EDF3-7769-45BB-8304-3081918FA633}"
+EndProject
Global
GlobalSection(SolutionConfigurationPlatforms) = preSolution
Debug|Any CPU = Debug|Any CPU
@@ -117,6 +121,14 @@ Global
{7004726B-5B33-4B2A-ADDB-EF22DA593630}.Debug|Any CPU.Build.0 = Debug|Any CPU
{7004726B-5B33-4B2A-ADDB-EF22DA593630}.Release|Any CPU.ActiveCfg = Release|Any CPU
{7004726B-5B33-4B2A-ADDB-EF22DA593630}.Release|Any CPU.Build.0 = Release|Any CPU
+ {FC39DDE9-AC80-40A2-9CCA-DC06510A8881}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+ {FC39DDE9-AC80-40A2-9CCA-DC06510A8881}.Debug|Any CPU.Build.0 = Debug|Any CPU
+ {FC39DDE9-AC80-40A2-9CCA-DC06510A8881}.Release|Any CPU.ActiveCfg = Release|Any CPU
+ {FC39DDE9-AC80-40A2-9CCA-DC06510A8881}.Release|Any CPU.Build.0 = Release|Any CPU
+ {D511EDF3-7769-45BB-8304-3081918FA633}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+ {D511EDF3-7769-45BB-8304-3081918FA633}.Debug|Any CPU.Build.0 = Debug|Any CPU
+ {D511EDF3-7769-45BB-8304-3081918FA633}.Release|Any CPU.ActiveCfg = Release|Any CPU
+ {D511EDF3-7769-45BB-8304-3081918FA633}.Release|Any CPU.Build.0 = Release|Any CPU
EndGlobalSection
GlobalSection(SolutionProperties) = preSolution
HideSolutionNode = FALSE
diff --git a/C#核心/Lesson19_多态-接口/Lesson19_多态-接口.csproj b/C#核心/Lesson19_多态-接口/Lesson19_多态-接口.csproj
new file mode 100644
index 0000000..6b73120
--- /dev/null
+++ b/C#核心/Lesson19_多态-接口/Lesson19_多态-接口.csproj
@@ -0,0 +1,11 @@
+
+
+
+ Exe
+ net8.0
+ Lesson19_多态_接口
+ enable
+ enable
+
+
+
diff --git a/C#核心/Lesson19_多态-接口/Program.cs b/C#核心/Lesson19_多态-接口/Program.cs
new file mode 100644
index 0000000..7432da7
--- /dev/null
+++ b/C#核心/Lesson19_多态-接口/Program.cs
@@ -0,0 +1,189 @@
+namespace Lesson19_多态_接口
+{
+ #region 知识点一 接口的概念
+ //接口是行为的抽象规范
+ //他也是一种自定义类型
+ //关键字 interface
+
+ //接口声明的规范
+ //1.不包含成员变量
+ //2.只包含方法、属性、索引器、事件
+ //3.成员不能被实现
+ //4.成员可以不用写访问修饰符，不能是私有的
+ //5.接口不能继承类，但是可以继承另一个接口
+
+ //接口的使用规范
+ //1.类可以继承多个接口
+ //2.类继承接口后，必须实现接口中所有成员
+
+ //特点：
+ //1.他和类的声明类似
+ //2.接口是用来继承的
+ //3.接口不能被实例化，但是可以作为容器存储对象
+ #endregion
+
+ #region 知识点二 接口的声明
+ //接口的关键字：interface
+ //语法：
+ //interface 接口名
+ //{
+ //}
+ //一句话记忆：接口是抽象行为的基类
+ //接口命名规范 帕斯卡前面加个I
+ interface IFly
+ {
+ //int a;不能包含成员变量
+ void Fly();//可以加public和protect，不能加private这样违反了上面使用规范知识点的2
+ string Name
+ {
+ get;
+ set;
+ }
+ int this[int index]
+ {
+ get;
+ set;
+ }
+
+ event Action doSomthing;//先不学事件声明
+ }
+ #endregion
+
+ #region 知识点三 接口的使用
+ class Animal
+ {
+
+ }
+ //接口用来继承
+ //1.类可以继承1个类，n个接口
+ //2.继承了接口后 必须实现其中的内容 并且必须是public的
+ class Human : Animal, IFly
+ {
+ public int this[int index]
+ {
+ get
+ {
+ return 0;
+ }
+ set
+ {
+ this[index] = value;
+ }
+ }
+ public string Name
+ {
+ get;
+ set;
+ }
+ public event Action doSomthing;
+ //3.实现的接口函数，可以通过加virtual再在子类中重写
+ //4.接口也遵循里氏替换原则
+ public virtual void Fly()
+ {
+ Console.WriteLine("人飞");
+ }
+ }
+ #endregion
+
+ #region 知识点四 接口可以继承接口
+ //接口继承接口时 不需要实现
+ //待类继承接口后 类自己去实现所有内容
+ interface IWalk
+ {
+ void Walk();
+ }
+ interface IMove : IFly,IWalk
+ {
+ void Move();
+ }
+ class Test : IMove
+ {
+ public int this[int index] { get => throw new NotImplementedException(); set => throw new NotImplementedException(); }
+
+ public string Name { get => throw new NotImplementedException(); set => throw new NotImplementedException(); }
+
+ public event Action doSomthing;
+
+ public void Fly()
+ {
+ throw new NotImplementedException();
+ }
+
+ public void Move()
+ {
+ throw new NotImplementedException();
+ }
+
+ public void Walk()
+ {
+ throw new NotImplementedException();
+ }
+ }
+ #endregion
+
+ #region 知识点五 显示实现接口
+ //当一个类继承两个接口
+ //但是接口中存在着同名方法时
+ //注意：显示实现接口时 不能写访问修饰符
+
+ interface IAtk
+ {
+ void Atk();
+ }
+ interface ISuperAtk
+ {
+ void Atk();
+ }
+ class Player : ISuperAtk, IAtk
+ {
+ void ISuperAtk.Atk()//显示实现接口就是 接口名.方法
+ {
+ throw new NotImplementedException();
+ }
+
+ void IAtk.Atk()
+ {
+ throw new NotImplementedException();
+ }
+ public void Atk()
+ {
+ throw new NotImplementedException();
+ }
+ }
+ #endregion
+ internal class Program
+ {
+ static void Main(string[] args)
+ {
+ //IFly f = new IFly();不能被实例化
+ IFly f = new Human();//可以用里氏替换原则
+ f.Fly();
+
+ IMove m = new Test();
+ IFly f2 = new Test();
+ IWalk w = new Test();
+
+
+ IAtk ia = new Player();
+ ISuperAtk isa = new Player();
+
+ Player p = new Player();
+ (p as IAtk).Atk();
+ (p as ISuperAtk).Atk();
+ p.Atk();
+ }
+ }
+
+ // 总结:
+ // 继承类：是对象间的继承，包括特征行为等等
+ // 继承接口：是行为间的继承，继承接口的行为规范，按照规范去实现内容
+ // 由于接口也是遵循里氏替换原则，所以可以用接口容器装对象
+ // 那么久可以实现 装载各种毫无关系但是却有相同行为的对象
+
+ // 注意:
+ //1. 接口值包含 成员方法、属性、索引器、事件，并且都不实现，都没有访问修饰符
+ //2. 可以继承多个接口，但是只能继承一个类
+ //3. 接口可以继承接口，相当于在进行行为合并，待子类继承时再去实现具体的行为
+ //4. 接口可以被显示实现 主要用于实现不同接口中的同名函数的不同表现
+ //5. 实现的接口方法 可以加 virtual 关键字 之后子类 再重写
+}
diff --git a/C#核心/Lesson19_多态-接口练习/Lesson19_多态-接口练习.csproj b/C#核心/Lesson19_多态-接口练习/Lesson19_多态-接口练习.csproj
new file mode 100644
index 0000000..a27c65d
--- /dev/null
+++ b/C#核心/Lesson19_多态-接口练习/Lesson19_多态-接口练习.csproj
@@ -0,0 +1,11 @@
+
+
+
+ Exe
+ net8.0
+ Lesson19_多态_接口练习
+ enable
+ enable
+
+
+
diff --git a/C#核心/Lesson19_多态-接口练习/Program.cs b/C#核心/Lesson19_多态-接口练习/Program.cs
new file mode 100644
index 0000000..5856684
--- /dev/null
+++ b/C#核心/Lesson19_多态-接口练习/Program.cs
@@ -0,0 +1,185 @@
+using Lesson19_多态_接口练习;
+
+namespace Lesson19_多态_接口练习
+{
+ interface ICheck
+ {
+ public void Check();
+ }
+ class Person : ICheck
+ {
+ public void Check()
+ {
+ Console.WriteLine("派出所登记");
+ }
+ }
+ class Car
+ {
+ public void Check()
+ {
+ Console.WriteLine("车管所登记");
+ }
+ }
+ class House
+ {
+ public void Check()
+ {
+ Console.WriteLine("房管局登记");
+ }
+ }
+
+
+ interface IFly
+ {
+ public void Fly();
+ }
+ interface IWalk
+ {
+ public void Walk();
+ }
+ interface ISwim
+ {
+ public void Swim();
+ }
+
+ class Sparrow : IFly, IWalk
+ {
+ public void Fly()
+ {
+ Console.WriteLine("麻雀飞");
+ }
+ public void Walk()
+ {
+ Console.WriteLine("麻雀走");
+ }
+ }
+ class Ostrich : IWalk
+ {
+ public void Walk()
+ {
+ Console.WriteLine("鸵鸟走");
+ }
+ }
+ class Penguin : IWalk, ISwim
+ {
+ public void Walk()
+ {
+ Console.WriteLine("企鹅走");
+ }
+ public void Swim()
+ {
+ Console.WriteLine("企鹅游泳");
+ }
+ }
+ class Parrot : IFly, IWalk
+{
+ public void Fly()
+ {
+ Console.WriteLine("鹦鹉飞");
+ }
+ public void Walk()
+ {
+ Console.WriteLine("走");
+ }
+ }
+ class Helicopter : IFly
+ {
+ public void Fly()
+ {
+ Console.WriteLine("直升机飞");
+ }
+ }
+ class Swan : IFly, IWalk, ISwim
+ {
+ public void Fly()
+ {
+ Console.WriteLine("天鹅飞");
+ }
+ public void Walk()
+ {
+ Console.WriteLine("天鹅走");
+ }
+ public void Swim()
+ {
+ Console.WriteLine("天鹅游泳");
+ }
+ }
+
+
+ interface IUSB
+ {
+ void ReadData();
+ }
+
+ class StorageDevice : IUSB
+ {
+ public string name;
+ public StorageDevice(string name)
+ {
+ this.name = name;
+ }
+ public void ReadData()
+ {
+ Console.WriteLine("USB{0}传输数据",name);
+ }
+ }
+
+ class MP3 : IUSB
+ {
+ public void ReadData()
+ {
+ Console.WriteLine("MP3传输数据");
+ }
+ }
+ class Computer
+ {
+ public IUSB usb1;
+ }
+ internal class Program
+ {
+ static void Main(string[] args)
+ {
+ Console.WriteLine("Hello, World!");
+ Person p1= new Person();
+ p1.Check();
+ Car c1 = new Car();
+ c1.Check();
+ House h1 = new House();
+ h1.Check();
+
+ Sparrow s1 = new Sparrow();
+ s1.Walk();
+ s1.Fly();
+ Ostrich o1 = new Ostrich();
+ o1.Walk();
+ Penguin p2 = new Penguin();
+ p2.Swim();
+ p2.Walk();
+ Parrot p3 = new Parrot();
+ p3.Walk();
+ p3.Fly();
+ Helicopter h2 = new Helicopter();
+ h2.Fly();
+ Swan s3 = new Swan();
+ s3.Walk();
+ s3.Fly();
+ s3.Swim();
+
+ StorageDevice hd = new StorageDevice("移动硬盘");
+ StorageDevice ud = new StorageDevice("U盘");
+ MP3 mp3 = new MP3();
+ Computer computer = new Computer();
+
+ computer.usb1 = hd;
+ computer.usb1.ReadData();
+
+ computer.usb1 = ud;
+ computer.usb1.ReadData();
+
+ computer.usb1 = mp3;
+ computer.usb1.ReadData();
+
+
+ }
+ }
+}