Method getFirstBox

Exercises/Modules/Chapter 12/Soln12_08/Truckload.cpp:80–85

}

SharedBox Truckload::Iterator::getFirstBox()
{
  // Return m_head's box (or nullptr if the list is empty)
  m_current = m_head;
  return getCurrentBox();
}

SharedBox Truckload::Iterator::getLastBox()
{