What are types of classes in C++?

A class can be thought of as a “type” , with the objects being a “variable” of that type. Multiple objects, or instances of a class can be created in a single HLU program, just as you declare multiple variables of the same type in any program.

A Simple (basic) Class [Also Called – Instance Class, Concrete Class, Complete Class] So, a simple class has methods and their implementation. This class can be instantiated to create object(s) and used to perform an action on the data of the class using its methods. This class can be used for inheritance.10 Ara 2019

A nested class is a member of its enclosing class . Non-static nested classes (inner classes) have access to other members of the enclosing class, even if they are declared private. Static nested classes do not have access to other members of the enclosing class.