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Abstraction (C++ and PHP Cross Reference Guide)

By Mike Prestwood

C++ versus PHP: A side by side comparison between C++ and PHP.

 
OOP Details
 

More object oriented (OO) stuff.

Abstraction

[Other Languages] 

General Info: Abstract Class / Abstract Member

An abstract class member is a member that is specified in a class but not implemented. Classes that inherit from the class will have to implement the abstract member. Abstract members are a technique for ensuring a common interface with descendant classes. An abstract class is a class you cannot instantiate. A pure abstract class is a class with only abstract members.

Languages Focus

Abstraction is supported at various levels with each language. A language could enforce abstraction at the class level (either enforcing a no-instantiation rule or a only abstract members rule), and with class members (member methods and/or properties).

C++:   =0 in a virtual method

AbstractMemberFunction is a pure virtual function makes this class Abstract class indicated by the "=0"and NonAbstractMemberFunction1 is a virtual function.

Syntax Example:
class AbstractClass {
public:
virtual void AbstractMemberFunction() = 0;
  virtual void NonAbstractMemberFunction1();

};
[Not specified yet. Coming...]












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