#include <iostream.h>

class myOldClass
{
public:
   int i1;

   virtual void func1(int i)
   {
      cout << "Calling myOldClass.func1(int)...\n";
      i1 = i1 + i*i;
   }
};

class myNewClass : public myOldClass
{
public:
   int i2;

   virtual void func1(int i)
   {
      cout << "Calling myNewClass.func1(int)...\n";
      i2 = i2 + 1000*i;
   }
};

void  doSomething( myOldClass *ptr )              
{
   ptr->func1(4);
}

int main(int argc, char *argv[])
{
   myOldClass A;
   myNewClass B;

   // *************************************************************************
   // Function polymorphism using parameter passing
   // *************************************************************************
   cout << "doSomething(&A):" << endl;
   doSomething(&A);
   cout << endl;

   cout << "doSomething(&B):" << endl;
   doSomething(&B);
   cout << endl;

}