C # Learning Diary---multiple inheritance

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

The thought of inheritance realizes the relationship of (IS-A). For example, mammals belong to (is-a) animals, dogs belong to (is-a) mammals, so that dogs belong to (is-a) animals.

base class and derived class:

Derived classes in C # inherit members from his direct base class, methods, properties, fields, events, index indicators but except constructors and destructors.

Write an example below.

Using System;  Using System.Collections.Generic;  Using System.Linq;  Using System.Text;    Namespace Test  {      class Anlimal  //defines a base class      {          protected int foot = 4;          Protected double weight = 22.4;          protected void Say (string type, string call)          {              Console.WriteLine ("Category: {0}, cry: {1}", Type,call);          }         //dog Inherits 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 ("Dog", "barking");}}}  

Results

Multiple inheritance:

C # does not support multiple inheritance. However, you can use the interface to implement multiple inheritance, the above example we add a Smallanlimal interface for him

Using System;  Using System.Collections.Generic;  Using System.Linq;    Using System.Text;          Namespace Test {class Anlimal//defines a base class {protected int foot = 4;          Protected double weight = 22.4;          protected void Say (string type, String call) {Console.WriteLine ("Category: {0}, cry: {1}", Type,call); }} public interface Smallanlimal//Add an interface interface only declares that the method is implemented in a subclass {protected void hight (double high               T);          }//dog inherits Anlimal class Dog:anlimal,smallanlimal {public void hight (double hight)//Implement Interface          {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 ("Dog", "barking"); }      } } 

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