An object-oriented system might use an abstract base class to provide a common and standarized interface appropriate for all the external applications. Then, through inheritance from that abstract base class, derived classes are formed that all operate similarly.The capabilities (i.e., the public functions) offered by the external applications are provided as pure virtual functions in the abstract base class. The implementations of these pure virtual functions are provided in the derived classes that correspond to the specific types of the application.This architecture also allows new applications to be added to a system easily, even after the system has been defined.
C++
Topic: Constructors and destructors
Explain about Designing Strategy ?
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What are Class Constructors and destructors in C++ ?
What is the use of Constructor ?
What is the use of Destructors
What are Constructor and Destructor Order ?
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What are types of Constructor ?
