STL Container

[makan007]

Which STL container is most appropriate to store telephone records?

[hamsterman]

what do you want to do with those records?

[makan007]

Display the contents (a list of telephone nos) of the container.

[Albatross]

I would suggest an std::set. A set ensures that there are no duplicates (it's like a map, except its elements are the keys), and there's even some weak sorting done. There's no push_back(), but there is still insert().
http://cplusplus.com/reference/stl/set/

-Albatross