C# 中的晚期绑定是什么?
csharpprogrammingserver side programming更新于 2025/10/14 19:37:17
静态多态性是指函数的响应在编译时确定。动态多态性是指函数的响应在运行时确定。动态多态性就是我们所说的晚期绑定。
动态多态性是通过抽象类和虚函数实现的。以下示例展示了动态多态性。 −
示例
using System;
namespace PolymorphismApplication {
class Shape {
protected int width, height;
public Shape( int a = 0, int b = 0) {
width = a;
height = b;
}
public virtual int area() {
Console.WriteLine("Parent class area :");
return 0;
}
}
class Rectangle: Shape {
public Rectangle( int a = 0, int b = 0): base(a, b) {}
public override int area () {
Console.WriteLine("Rectangle class area :");
return (width * height);
}
}
class Triangle: Shape {
public Triangle(int a = 0, int b = 0): base(a, b) {}
public override int area() {
Console.WriteLine("Triangle class area :");
return (width * height / 2);
}
}
class Caller {
public void CallArea(Shape sh) {
int a;
a = sh.area();
Console.WriteLine("Area: {0}", a);
}
}
class Tester {
static void Main(string[] args) {
Caller c = new Caller();
Rectangle r = new Rectangle(10, 7);
Triangle t = new Triangle(10, 5);
c.CallArea(r);
c.CallArea(t);
Console.ReadKey();
}
}
}
输出
Rectangle class area : Area: 70 Triangle class area : Area: 25
