#include "D.h"
#include <sstream>

std::string D::g(){
  std::stringstream ss;
  ss << "D::g-" << i;
  return ss.str();
  }

std::string D::h(){
  std::stringstream ss;
  ss << "D::h-" << i <<" "<< B::h() <<" "<<  C::h();
  return ss.str();
  }