什么是C#中的后期绑定?
在静态多态性中,对函数的响应是在编译时确定的。在动态多态中,它是在运行时决定的。动态多态是我们所谓的后期绑定。
动态多态性由抽象类和虚函数实现。以下示例显示了动态多态性的示例-
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("家长课区:");
return 0;
}
}
class Rectangle: Shape {
public Rectangle( int a = 0, int b = 0): base(a, b) {}
public override int area () {
Console.WriteLine("矩形类区域:");
return (width * height);
}
}
class Triangle: Shape {
public Triangle(int a = 0, int b = 0): base(a, b) {}
public override int area() {
Console.WriteLine("三角类区域:");
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();
}
}
}输出结果
矩形类区域: Area: 70 三角类区域: Area: 25
热门推荐
10 对患者生日祝福语简短
11 结婚祝福语简短装备
12 周岁祝福语学生文案简短
13 订婚领证祝福语简短精辟
14 导师获奖祝福语大全简短
15 新婚购房祝福语简短精辟
16 牛年祝福语简短的爱人
17 送芒果的祝福语简短
18 送给学长毕业祝福语简短