#include <iostream>
#include <typeinfo>
using namespace std;

class base { virtual void do_nothing() {} };
class derived : public base {};

int main()
{
  base*       ptr_b ;
  derived*    ptr_d ;

  cout << " base    " << typeid(ptr_b).name() << endl;
  cout << " derived " << typeid(ptr_d).name() << endl;


  return(0);
}