Containership in C++ with Example

Whenever an object of a class is declared as a member of another class it is known as a container class.

In the container-ship the object of one class is declared in another class.

Example:

#include<iostream.h>

#include<conio.h>

class A

               {

                              int a;

                              public:

                              void get();

               };

class B

               {

                              int b;

                              A t;         // object t of class A is declare in class B

                              public:

                              void getdata();

               };

void A :: get()

{

               cin>>a;

               cout<<a;

}

void B :: getdata()

{

               cin>>b;

               cout<<b;

               t.get();                  //calling of get() of class A in getdata() of class B

}

void main()

{

               Clrscr();

               B ab;

               ab.getdata();

               getch();

}