#include <iostream>
#include <stdlib.h>

using namespace std;

class Mother
{
 public:
 virtual void Speak()=0;     //just a standard abstract function 
 virtual void * GetSelf()=0; //this will return pointer to the Son class
};

class Son : public Mother
{ 
 public:
 void Speak() {cout<< "I can speak!"<<endl;};           //definition of this function
 void Personal() {cout << "I can get personal!"<<endl;};//a function available only in this sub-class
 
 void * GetSelf() {return this;} //returns pointer to self
};

int main(int argc, char *argv[])
{
  Mother * Mom;             //create mom pointer
  Son * Sonny;              //create son pointer
  Son * SecondSon;          //create a pointer to son which will be obtained through mother
  
  Sonny = new Son;          //It's a boy!
  Mom = Sonny;              //now set the mom pointer to point at Sonny
    
  cout << "Son speaking:\n"; 
  Sonny->Speak();           //let the kid speak
  Sonny->Personal();        //let the kid get persona
  cout << "Mom Speaking:\n"; 
  Mom->Speak();             //let mommy speak about the son
  
  
  cout << "Son speaking through mother:\n";
  SecondSon = (Son*)Mom->GetSelf(); //assign the pointer to Sonny variable THROUGH mother variable
  SecondSon->Speak();               //speak
  SecondSon->Personal();            //get personal
  
  system("PAUSE");	
  return 0;
}