abstract class vs interface cpp

Abstract classes cannot be used to instantiate objects and serves only as an interface Attempting to instantiate an object of an abstract class causes a compilation

only serve as the interface to a class that implements its opera tor[]() and size() functions A class with a pure virtual function is called an abstract class

In these cases, interfaces based on abstract classes introduce much needless inefficiency First, they add a vtable to the overhead of each instance of concrete  

Programming for MSc Part II Part 2: OOP in C++ — Polymorphism and Abstract Classes In the previous example, the IntStack class is an interface Abstract 

We present a small mixed-language example that imports into Ada a C++ class hierarchy with multiple inheritance, when all but one of the base classes have only 

Templates in C++ support generic progarmming Templates provide: interface Templates in C++ template class mytemplate { public: mytemplate (); Abstract class (virtual function): defines an interface •Code implementing 

will define abstract classes and describe how to use them as tools for Object abstract class] provides a common public interface for the entire class hierarchy ” 3 functions typically have no implementation, C++ allows implementations to be 

The class diagram 2 1 shows two derived classes that implement the interface / abstract base class DynamicInterface Figure 2 1: Class diagram: Dynamic 

C++ List Interface (Abstract Class) template class ListInterface { public: virtual ~ListInterface() {} virtual T get(size_t index) const = 0; virtual void