From d6767da6da05a966f124d668a36a0dfb4f243056 Mon Sep 17 00:00:00 2001 From: Kister Hakusan <2753888203@qq.com> Date: Thu, 11 Sep 2025 15:07:37 +0800 Subject: [PATCH] =?UTF-8?q?=E6=B7=BB=E5=8A=A0Lesson17?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- C#核心/C#核心.sln | 12 ++ .../Lesson14_继承-继承中的构造函数/Program.cs | 5 +- .../Lesson17_多态-vob/Lesson17_多态-vob.csproj | 11 ++ C#核心/Lesson17_多态-vob/Program.cs | 134 +++++++++++++++ .../Lesson17_多态-vob练习.csproj | 11 ++ C#核心/Lesson17_多态-vob练习/Program.cs | 154 ++++++++++++++++++ 6 files changed, 325 insertions(+), 2 deletions(-) create mode 100644 C#核心/Lesson17_多态-vob/Lesson17_多态-vob.csproj create mode 100644 C#核心/Lesson17_多态-vob/Program.cs create mode 100644 C#核心/Lesson17_多态-vob练习/Lesson17_多态-vob练习.csproj create mode 100644 C#核心/Lesson17_多态-vob练习/Program.cs diff --git a/C#核心/C#核心.sln b/C#核心/C#核心.sln index ec67d2d..f9e4ce1 100644 --- a/C#核心/C#核心.sln +++ b/C#核心/C#核心.sln @@ -31,6 +31,10 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Lesson16_继承-密封类", 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 +Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Lesson17_多态-vob", "Lesson17_多态-vob\Lesson17_多态-vob.csproj", "{9B334A2E-3B5C-49AC-B1E8-2CE2FDC04158}" +EndProject +Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Lesson17_多态-vob练习", "Lesson17_多态-vob练习\Lesson17_多态-vob练习.csproj", "{B9598C23-6AD4-44FB-B16B-6A0A80B8D9CD}" +EndProject Global GlobalSection(SolutionConfigurationPlatforms) = preSolution Debug|Any CPU = Debug|Any CPU @@ -93,6 +97,14 @@ Global {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 + {9B334A2E-3B5C-49AC-B1E8-2CE2FDC04158}.Debug|Any CPU.ActiveCfg = Debug|Any CPU + {9B334A2E-3B5C-49AC-B1E8-2CE2FDC04158}.Debug|Any CPU.Build.0 = Debug|Any CPU + {9B334A2E-3B5C-49AC-B1E8-2CE2FDC04158}.Release|Any CPU.ActiveCfg = Release|Any CPU + {9B334A2E-3B5C-49AC-B1E8-2CE2FDC04158}.Release|Any CPU.Build.0 = Release|Any CPU + {B9598C23-6AD4-44FB-B16B-6A0A80B8D9CD}.Debug|Any CPU.ActiveCfg = Debug|Any CPU + {B9598C23-6AD4-44FB-B16B-6A0A80B8D9CD}.Debug|Any CPU.Build.0 = Debug|Any CPU + {B9598C23-6AD4-44FB-B16B-6A0A80B8D9CD}.Release|Any CPU.ActiveCfg = Release|Any CPU + {B9598C23-6AD4-44FB-B16B-6A0A80B8D9CD}.Release|Any CPU.Build.0 = Release|Any CPU EndGlobalSection GlobalSection(SolutionProperties) = preSolution HideSolutionNode = FALSE diff --git a/C#核心/Lesson14_继承-继承中的构造函数/Program.cs b/C#核心/Lesson14_继承-继承中的构造函数/Program.cs index 3a4a882..9e70ff7 100644 --- a/C#核心/Lesson14_继承-继承中的构造函数/Program.cs +++ b/C#核心/Lesson14_继承-继承中的构造函数/Program.cs @@ -55,7 +55,8 @@ //父类的父类的构造->...父类构造->...->子类构造 class GameObject { - public GameObject() { + public GameObject() + { Console.WriteLine("gameobject的构造函数"); } } @@ -104,7 +105,7 @@ class Son : Father { - public Son(int i):base(i)//用base来传给父类构造函数一个值 + public Son(int i) : base(i)//用base来传给父类构造函数一个值 { Console.WriteLine("son 1,参数i的值{0}", i); } diff --git a/C#核心/Lesson17_多态-vob/Lesson17_多态-vob.csproj b/C#核心/Lesson17_多态-vob/Lesson17_多态-vob.csproj new file mode 100644 index 0000000..86ddb13 --- /dev/null +++ b/C#核心/Lesson17_多态-vob/Lesson17_多态-vob.csproj @@ -0,0 +1,11 @@ + + + + Exe + net8.0 + Lesson17_多态_vob + enable + enable + + + diff --git a/C#核心/Lesson17_多态-vob/Program.cs b/C#核心/Lesson17_多态-vob/Program.cs new file mode 100644 index 0000000..9c9354f --- /dev/null +++ b/C#核心/Lesson17_多态-vob/Program.cs @@ -0,0 +1,134 @@ +namespace Lesson17_多态_vob +{ + #region 知识回顾 + + #region 封装——用程序语言来形容对象 + class 类名 + { + #region 特征——成员变量 + #endregion + + #region 行为——成员方法 + #endregion + + #region 初始化调用——构造函数 + #endregion + + #region 释放时调用——析构函数 + #endregion + + #region 保护成员变量——成员属性 + #endregion + + #region 像数组一样使用——索引器 + #endregion + + #region 类名点出直接使用——静态成员 + #endregion + + #region 自定义对象可计算——运算符重载 + #endregion + } + + #region 静态类和静态构造函数 + #endregion + + #region 拓展方法 + #endregion + + #endregion + + #region 继承——复用封装对象的代码：儿子继承父亲，复用现成代码 + #endregion + + #endregion + + #region 知识点一 多态的概念 + // 多态按字面意思就是“多种状态” + // 让继承同一父类的子类们 在执行相同方法时有不同的表现（状态） + // 主要目的 + // 同一父类的对象 执行相同行为（方法）有不同的表现 + // 解决的问题 + // 让同一个对象有位移行为的特征 + #endregion + + #region 知识点二 解决的问题 + class Father + { + public void Speak() + { + Console.WriteLine("Father Speak"); + } + } + class Son : Father + { + public void Speak() + { + Console.WriteLine("Son Speak"); + } + } + #endregion + + #region 知识点三 多态的实现 + //我们目前已经学过的多态 + //编译时多态——函数重载，开始就写好的 + + //我们将学习的： + //运行时多态（vob、抽象函数、接口） + //我们今天学习 vob + //v: virtual(虚函数) + //o: override(重写) + //b: base(父类) + + + + class GameObject + { + public string name; + public GameObject(string name) + { + this.name = name; + } + + public virtual void Atk()//虚函数 + { + Console.WriteLine("游戏对象攻击"); + } + } + class Player : GameObject + { + public Player(string name):base(name) + { + + } + //代表着重写虚函数 + public override void Atk() + { + //base来保留父类的函数 + base.Atk();//执行父类(base)的Atk方法 + Console.WriteLine("玩家对象攻击"); + } + } + #endregion + internal class Program + { + static void Main(string[] args) + { + Console.WriteLine("Hello, World!"); + #region 解决的问题 + Father f = new Son(); + f.Speak(); + + (f as Son).Speak(); + #endregion + + #region 多态的使用 + GameObject p = new Player("123"); + p.Atk();//虽然是父类对象装载的p，但是p是他的子类player类型的 + //如果不用override来重写，那么调用的atk将会是父类的atk + //既然有了虚函数和重写那么调用的就是子类的atk + + #endregion + } + } +} diff --git a/C#核心/Lesson17_多态-vob练习/Lesson17_多态-vob练习.csproj b/C#核心/Lesson17_多态-vob练习/Lesson17_多态-vob练习.csproj new file mode 100644 index 0000000..3556c3b --- /dev/null +++ b/C#核心/Lesson17_多态-vob练习/Lesson17_多态-vob练习.csproj @@ -0,0 +1,11 @@ + + + + Exe + net8.0 + Lesson17_多态_vob练习 + enable + enable + + + diff --git a/C#核心/Lesson17_多态-vob练习/Program.cs b/C#核心/Lesson17_多态-vob练习/Program.cs new file mode 100644 index 0000000..323793a --- /dev/null +++ b/C#核心/Lesson17_多态-vob练习/Program.cs @@ -0,0 +1,154 @@ +using System.Threading.Channels; + +namespace Lesson17_多态_vob练习 +{ + #region 鸭子题 + class Duck + { + public virtual void Speak() + { + Console.WriteLine("嘎嘎叫"); + } + } + class WoodDuck : Duck + { + public override void Speak() + { + Console.WriteLine("吱吱叫"); + } + + } + class RubberDuck : Duck + { + public override void Speak() + { + Console.WriteLine("叽叽叫"); + } + } + #endregion + + #region 打卡题 + class Staff + { + public virtual void Clockin() + { + Console.WriteLine("员工9点打卡"); + } + } + class Boss: Staff + { + public override void Clockin() + { + Console.WriteLine("老板11点打卡"); + } + + } + class Programer : Staff + { + public override void Clockin() + { + Console.WriteLine("程序员无需打卡"); + } + } + #endregion + + #region 计算题 + class Graph + { + public virtual void Perimeter() + { + Console.WriteLine("未初始化图形无法计算"); + } + public virtual void Area() + { + Console.WriteLine("未初始化图形无法计算"); + } + } + class Rectangle : Graph + { + public int x, y; + public Rectangle(int x, int y) + { + this.x = x; + this.y = y; + } + public override void Perimeter() + { + Console.WriteLine("矩形周长为{0}", (x + y) * 2); + } + public override void Area() + { + Console.WriteLine("矩形面积为{0}", x * y); + } + } + class Square : Graph + { + public int x; + public Square(int x) + { + this.x = x; + } + + public override void Perimeter() + { + Console.WriteLine("方的周长为{0}", x * 4); + } + public override void Area() + { + Console.WriteLine("方的面积为{0}", x * x); + } + } + class Round : Graph + { + public double PI = 3.1415926; + int r; + public Round(int r) + { + this.r = r; + } + public override void Perimeter() + { + double perimeter = 2 * PI * r; + Console.WriteLine("圆的周长{0}",perimeter); + } + public override void Area() + { + double areas = PI * r * r; + Console.WriteLine("圆的面积{0}",areas); + } + } + + #endregion + + internal class Program + { + static void Main(string[] args) + { + Console.WriteLine("Hello, World!"); + Duck realDuck = new Duck(); + realDuck.Speak(); + Duck woodDuck = new WoodDuck(); + woodDuck.Speak(); + Duck rubberDuck = new RubberDuck(); + rubberDuck.Speak(); + + Programer p = new Programer(); + p.Clockin(); + Boss b = new Boss(); + b.Clockin(); + Staff s = new Staff(); + s.Clockin(); + + Graph rectangle = new Rectangle(2,3); + rectangle.Perimeter(); + rectangle.Area(); + Graph square = new Square(2); + square.Perimeter(); + square.Area(); + Graph round = new Round(3); + round.Perimeter(); + round.Area(); + + } + } +} \ No newline at end of file