C#类的运用，继承，多态，方法重写

Posted 2020-07-22 广科菜鸟

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ObjTest
{
class Program
{
static void Main(string[] args)
{
//car a = new car();
//a.name = "bmw";
//a.run();
//car b = new car();
//b.name = "lbjn";
//b.run();

// 子类创建对象并初始化

Bmw b = new Bmw();
b.name = "bmw";
b.you = 100;
b.lun = 4;
b.run();

// 子类创建对象并初始化

Dcar d = new Dcar();
d.name = "电车";
d.dian = 50;
d.lun = 6;
d.run();

//buyCar(b);
//buyCar(d);

Car c = new Car();
c.name = "本田";
buyCar(c);

Console.ReadKey();
}

public static void buyCar(Car a) //写一个静态父类方法（由类调用），父类的指向，指向子类的对象；（多态的体现），参数可以是基类Car的不同对象；
{
Console.Write("我要买" + a .name+ "\n");
}

 

 //定义一个父类（基类）Car;
public class Car {

//定义父类的name，lun属性； 

public string name;  
public int lun; 

//定义父类的方法；
public void run (){    
Console.Write(name+" run"+"\n");
}
}

//子类继承父类,并子类拥有自己的属性和方法

public class Bmw :Car{

//子类的属性

public int you;

//子类的拥有父类方法同名方法（重写父类的方法）

public void run()
{

//父类调用子类的方法用base
base.run();
Console.Write(lun+"个轮"+you + "升油" + name + " run" + "\n");
}
}

//定义另一个子类电车
public class Dcar : Car
{
public int dian;

public void run()
{
//base.run();
Console.Write(lun + "个轮" + dian + "度电" + name + " run" + "\n");
}
}

}
}