#include<iostream>
#include<conio.h>
using namespace std;
class CParent
{
public:
  virtual bool operator == (int iValue)
  {
    std::cout << "parent" << std::endl;
    return true;
  }
  virtual ~CParent()
  {
  }
};
class CSon: public CParent
{
public:
  virtual bool operator == (int iValue)
  {
    std::cout << "CSon" << std::endl;
    return true;
  }
  virtual ~CSon()
  {
  }
};
int main()
{
  CSon oSon;
  CParent *pParent = &oSon;
  CSon *pSon = &oSon;
  *pParent == 0;
  *pSon   == 0;
   getch();
  return 0;
 
}