class Role<T>
{
  public:
  void say (std::string& dialog, std::list<Role<T>>& listern);
  void interact (std::list<Role<T>>& partners);
};

class People;
class Scene
{
  public:
  void entry (std::list<Role<T>>& roles);
  void action ();
};

main()
{
  std::list<Role<People>> characters;
  Role<People> protagonist; characters.append (protagonist);
  Role<People> antagonist; characters.append(antagonist);
  Role<People> support_character; characters.append(support_character);

  Scene office;
  office.enter (characters);
  office.action ();
  exit (0);
}