Nested Class in C++ with example

In the C++, we can declare a class within another class.
A class declares as a member of another class is called as a nested class or a class within another class.
The name of a nested class is local to the enclosing class. The nested class is in the scope of its enclosing class.

Example:

#include<iostream.h>

#include<conio.h>

class student

               {

                              private :

int id;

   public:

void get();

void put();

class result

{

int marks;

   public:

void getdata();

void putdata ();

};

};

void student :: get()

{

cout<<”Enter the Student Info=”;

cin>>id;    

}

void student :: put()

{

               cout<<”Student Info”;

               cout<<id;

}

void student :: result :: getdata()

{

cout<<”Enter the Student marks=”;

cin>>marks;    

}

void student :: result :: putdata ()

{

               cout<<”Student marks=”;

               cout<<marks;

}

void main()

{

clrscr();

student st;

student :: result rt;

st.get();

rt.getdata();

st.put();

rt.putdata();

getch();

}