Classes derived from the abstract class must implement the pure virtual function or they, too, are abstract classes. Consider the example presented in [Virtual functions] (../cpp/virtual-functions.md) ...

If a class has pure virtual function then that class is known as abstract class. Object of that class cannot be created. However, pointer to the abstract class can be made Base *p ;. Abstract classes ...

Apparently, it's not possible to create a collection with an abstract type in STL. How do I go around the problem of creating a collection with a base abstract type and using that collection with ...

Hi,I have a base class whose destructor is pure virtual, so the class is abstract.I have a derived class (subtype) whose multi-argument constructor wants to call the base class's zero argument ...