#ifndef _header1_h
#define _header1_h

class Base1 {
 int i;
friend class boost::serialization::access;
template<typename Archive>
        void serialize (Archive &ar, const unsigned int )
        {
          ar & BOOST_SERIALIZATION_NVP(i);
        }

};

class Derived1 : public Base1 {
friend class boost::serialization::access;
template<typename Archive> 
        void serialize (Archive &ar, const unsigned int )
        {
          ar & BOOST_SERIALIZATION_BASE_OBJECT_NVP(Base1);
        }
};

#endif