#include <iostream>

using namespace std; 

class Base
{ 
  public: 
      virtual void example()=0; //Denotes pure virtual Function Definition
}; 
 

class Derived1 : public Base 
{ 
 public: 
   void example() 
       { 
         cout << "Hello "; 
       } 
};  

class Derived2 : public Base 
{ 
  public: 
     void example() 
      { 
          cout << "World"; 
      } 
}; 
 

int main() 
{ 
        Base* arrayOfObjects[2]; 
        Derived1 d1; 
        Derived2 d2; 
        arrayOfObjects[0]=&d1; 
        arrayOfObjects[1]=&d2; 
        arrayOfObjects[0]->example(); 
        arrayOfObjects[1]->example(); 

     getchar();
     return 0;
}