Nested classes

Nested class is a class defined inside a class, that can be used within the scope of the class in which it is defined. In C++ nested classes are not given importance because of the strong and flexible usage of inheritance. Its objects are accessed using "Nest::Display".

Example :

#include <iostream.h> class Nest { public: class Display { private: int s; public: void sum( int a, int b) { s =a+b; } void show( ) { cout << "\nSum of a and b is:: " << s;} }; }; void main() { Nest::Display x; x.sum(12, 10); x.show(); }

Result :
In the above example, the nested class "Display" is given as "public" member of the class "Nest".