Question

In C++, how is abstraction primarily achieved when defining a class that cannot be instantiated directly but serves as a blueprint for derived classes?

Q: Answer-In C++, how is abstraction primarily achieved when defining a class that cannot be instantiated dire...

o In C, a class is considered an abstract base class if it has at least one pure virtual function. A pure virtual function is declared by assigning 0 to it in the base classs declaration e.g., virtual void func 0. o Abstract classes cannot be instantiated directly. They serve as interfaces or blueprints, forcing derived classes to provide implementations for all pure virtual functions to become concrete instantiable.