54 lines
1.3 KiB
C#
54 lines
1.3 KiB
C#
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namespace Lesson20_多态_密封方法
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{
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internal class Program
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{
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#region 知识回顾
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//用sealed来防止类被继续继承
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#endregion
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#region 知识点一 密封方法的基本概念
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//用密封关键字sealed修饰的重写函数
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//作用：让虚方法或者抽象方法之后不能被重写
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//特点：和override一起出现
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#endregion
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#region 知识点二 实例
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abstract class Animal
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{
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public string name;
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public abstract void Eat();
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public virtual void Speak() {
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Console.WriteLine("123");
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}
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}
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class Person : Animal
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{
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public override void Eat()
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{
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Console.WriteLine("123");
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}
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public override void Speak()
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{
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Console.WriteLine("spaek");
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}
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}
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class WhitePerson : Person
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{
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public sealed override void Speak()
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{
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base.Speak();
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}
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public sealed override void Eat()
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{
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base.Eat();
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}
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}
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#endregion
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static void Main(string[] args)
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{
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Console.WriteLine("Hello, World!");
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}
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}
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}
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