Home  >  Article  >  Backend Development  >  C# Learning Diary 22---Multiple Inheritance

C# Learning Diary 22---Multiple Inheritance

黄舟
黄舟Original
2017-01-21 15:23:411617browse

Inheritance is one of the most important concepts in object-oriented programming. Inheritance allows us to define a class based on one class to define another class. When a class is derived from another class, the derived class inherits the characteristics from the base class

The idea of ​​inheritance is realized Belongs to (IS-A ) relation. For example, mammals are (IS-A) animals, dogs are (IS-A) mammals, so dogs are (IS-A) animals.

Base class and derived class:

In C#, a derived class inherits members, methods, properties, fields, events, index indicators from its direct base class but except for constructors and destructors function.

Write an example below.

using System;  
using System.Collections.Generic;  
using System.Linq;  
using System.Text;  
  
namespace Test  
{  
    class Anlimal  //定义一个基类  
    {  
        protected int foot = 4;  
        protected double weight = 22.4;  
        protected void say(string type, string call)  
        {  
            Console.WriteLine("类别:{0},叫声:{1} ",type,call);  
        }  
    }  
   
    //Dog 继承Anlimal   
    class Dog:Anlimal  
    {  
        static void Main(string[] args)  
        {  
            Dog dog = new Dog();  
            int foot = dog.foot;  
            double weight = dog.weight;  
            Console.WriteLine("dog foot: {0}\ndog weight:{1}",foot,weight);  
            dog.say("狗", "汪汪");  
        }  
    }  
}

Result

C# Learning Diary 22---Multiple Inheritance

Multiple inheritance:

C# does not support multiple inheritance. However, you can use interfaces to implement multiple inheritance. In the above example, we added a smallanlimal interface for it

using System;  
using System.Collections.Generic;  
using System.Linq;  
using System.Text;  
  
namespace Test  
{  
    class Anlimal  //定义一个基类  
    {  
        protected int foot = 4;  
        protected double weight = 22.4;  
        protected void say(string type, string call)  
        {  
            Console.WriteLine("类别:{0},叫声:{1} ",type,call);  
        }  
    }  
  
    public interface smallanlimal  //添加一个接口 接口只声明方法在子类中实现  
    {  
        protected void hight(double hight);  
         
    }  
    //Dog 继承Anlimal   
    class Dog:Anlimal,smallanlimal  
    {  
        public void hight(double hight)  //实现接口  
        {  
            Console.WriteLine("Hight: {0}",hight);  
        }  
        static void Main(string[] args)  
        {  
            Dog dog = new Dog();  
            int foot = dog.foot;  
            double weight = dog.weight;  
            dog.hight(23.23);  
            Console.WriteLine("dog foot: {0}\ndog weight:{1}",foot,weight);  
            dog.say("狗", "汪汪");  
        }  
    }  
}

The above is the content of C# Learning Diary 22---Multiple Inheritance. For more related content, please pay attention to PHP Chinese Net (www.php.cn)!


Statement:
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn