#include <iostream>
using namespace std;

class Base
{
   public:
     Base(int);
     virtual int getNumber();
   private:
     int numb;
};

class Derived:public Base
{
   public:
      Derived(int);
      virtual int getNumber();
};

class AnotherDerived : public Base
{
   public:
    AnotherDerived(int);
    virtual int getNumber();
};

AnotherDerived::AnotherDerived( int num )
: Base( num )
{}

int AnotherDerived::getNumber()
{
   return Base::getNumber() * 4;
}

Base::Base(int number)
{
   numb = number;
}

int Base::getNumber()
{
  return numb;
}

Derived::Derived(int number)
   : Base(number)
{

}  

Derived::getNumber()
{
   return Base::getNumber()*2;
}

void GetNumbers( Base* myarray[], int num )
{
   for (int i = 0; i < num; i++ )
   {
      cout <<myarray[i]->getNumber() <<endl;  
   }
}

int main()
{
   Base* b1 = new Base(5);
   Base* b2 = new Base(6);
   Derived* d1 = new Derived (7);
   Derived* d2 = new Derived (8);
   AnotherDerived* d3 = new AnotherDerived(10);

   cout << sizeof( Base ) <<endl;
   cout << sizeof( Derived ) <<endl;
   cout << sizeof( AnotherDerived ) <<endl;

   Base* someArray[5];

   someArray[0] = (Base*) b1;
   someArray[1] = (Base*) b2;
   someArray[2] = (Base*) d1;
   someArray[3] = (Base*) d2;
   someArray[4] = (Base*) d3;

   GetNumbers( someArray, 5 );
   //for (int i=0;i<4;i++)
   //  cout <<someArray[i]->getNumber()<<endl;
}