Question

Complete C++ functions

/return a set of movie titles which actorName was in //if the passing-in parameter : actorName,is not in the map, display message andreturn an empty set set<string>IMDB: find_movies_for_an_actor(string actorName) const //return a set of actor names which were all in the movieTitle /if the passing-in parameter: movieTitle is not in the map, display message and return an empty set set<string> IMDB: :find_actors_in_a_movie ( string movieTitle ) const

maps called actors_db and movies_db defined as private data members in header file

Answer 1

set<string> IMDB::find_movies_for_an_actor(string actorName) const
{
   set<string> empty;
   if(actors_db.find(actorName) == map::end)
   {
       cout << "Actor " << actorName << " not found" << endl;
       return empty;
   }
   else
       return actors_db[actorName];
}

set<string> IMDB::find_actors_in_a_movie(string movieTitle) const
{
   set<string> empty;
   if(actors_db.find(movieTitle) == map::end)
   {
       cout << "Movie " << movieTitle << " not found" << endl;
       return empty;
   }
   else
       return movies_db[movieTitle];
}