#include <iostream>

struct car
{
  int val;
  car() : val(0) {}
  car(int x) : val(x) {}

  virtual operator int()
  {
    return val+1;
  }
  virtual ~car() {}
};

struct Toyota : public car
{
  int val;
  Toyota() : val(0) {}
  Toyota(int x) : val(x) {}

  operator int()
  {
    return val+2;
  }
};

struct Honda : public car
{
  int val;
  Honda() : val(0) {}
  Honda(int x) : val(x) {}
};


int main(int argc, char** argv)
{
  car* car_array[3];

  car_array[0] = new car;
  car_array[1] = new Toyota;
  car_array[2] = new Honda;

  for (int i = 0; i < 3 ; ++i)
  {
    // call a conversion function from object to int
    // the base class has a virtual conversion function so the 
    // type actual conversion function to be called is determined at runtime
    int x = *car_array[i];
    delete car_array[i];
    std::cout << x << std::endl;
  }

  return 0;
}