添加Lesson17

2025-09-11 15:07:37 +08:00
parent aca44bc248
commit d6767da6da
6 changed files with 325 additions and 2 deletions
@@ -0,0 +1,11 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <RootNamespace>Lesson17_多态_vob练习</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>
@@ -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();
+
+        }
+    }
+}