difference between abstract class and interface in c#

In C #, abstract and virtual are easier to confuse, are related to inheritance, and involve the use of override. The difference between the two is discussed below:First, virtual method (virtual method)The virtual keyword is used to decorate a method in a base class. There are two things you can do with virtual:Scenario

Description of the relationship between the C ++ virtual base class and the abstract classI. Differences Virtual base class: the class inherited by "virtual", that is, any class can become a virtual base

This article from: http://113620916.qzone.qq.com/blog/1209003303 C # differences between class and interface, virtual method, and abstract method, value type, and reference type1. C # differences between classes and interfacesThe interface is responsible for defining functions. The project uses interfaces to d

#include Application of "C + + program" abstract class

1, read the following program, and write the results of the operation(3) Pure virtual function#include Expected operating Result: FSFSActual running results:Error Analysis: Base bref=first_obj; This sentence means bref for first_obj, and bref=second_obj; Second_obj for First_. obj assignment But there is no data member so there is no confusion. So the output fffs.The 13th Week "C + + language Basics" program reading-polymorphism and

static propertyConstructors for abstract classes(1) Do not abstract constructors that define public or protected internal access permissions in the class(2) constructor for protected or private access should be defined in an abstract class(3) If you define a protected const

　　Reading directoryI. Preface Ii. What is the difference between interfaces and abstract classes? 　　I. PrefaceIn object-oriented programming, abstraction is an agreement that the successor or implementer must follow. For example, if a class inherits or implements an interface, the class must implement all the members o

Polymorphism (virtual method) 1, in the parent class method to add virtual, this method can be a quilt class rewrite. Join override before the method of a subclass Polymorphism means that different objects receive the same message, which produces different behavior, and the same class shows different behavior characteristics in different situations. The role of p

A pure virtual function (pure virtual function) contains abstract base classes ). You cannot create abstract objects ). Method: Write = 0 after the function parameter table. If the value is 1, error: Invalid pure specifier (only '= 0' is allowed) before'; 'token Purpose: Prevent Users From creating disc_item objects and prevent users from performing any operations on disc_item. An error occurred while apply

particular virtual method, which is part of the implementation of the abstract class.Abstract classMyabs { Public Abstract voidAbMethod1 (); Public Abstract voidAbMethod2 (); } //Not necessary to implement all abstract methods//partial implementation is possible Abstract