C#中的覆写
运行时多态性具有方法重写,也称为动态绑定或延迟绑定。它通过抽象类和虚函数实现。抽象类包含抽象方法,由派生类实现。
让我们看看实现运行时多态性的抽象类的示例,并使用重写来操作 -
示例
using System; namespace PolymorphismApplication { abstract class Shape { public abstract int area(); } class Rectangle: Shape { private int length; private int width; public Rectangle( int a = 0, int b = 0) { length = a; width = b; } public override int area () { Console.WriteLine("Rectangle class area :"); return (width * length); } } class RectangleTester { static void Main(string[] args) { Rectangle r = new Rectangle(10, 7); double a = r.area(); Console.WriteLine("Area: {0}",a); Console.ReadKey(); } } }
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