/** @file list3604.cpp */
/** Listing 36-4. Adding a Class movie */
class movie : public work
{
public:
  movie() : runtime_(0) {}
  movie(std::string const& id, std::string const& title, int runtime)
  : work(id, title), runtime_(runtime)
  {}
  int runtime() const { return runtime_; }
private:
  int runtime_; ///< running length in minutes
};