Set

- [Narrator] A set is a container…that holds a sorted set of elements.…The set class holds only unique elements,…where the multiset class allows duplicates.…The unordered_set does not sort elements…and instead provides hashed keys for faster access.…Here I have a working copy of set.cpp…from chapter two of the exercise files.…And you'll notice I have the set header…and the unordered_set header included.…

And we have our convenience functions…for printing and for messages.…And then down here, starting in line 24,…I declare a set of strings,…and I initialize it with an initializer list.…And we report on the size of the set and print out the set.…And so when I build and run...…Scroll up here to the top.…And we can see I construct the set.…The set has five elements, so the size of set.…

And, here's the ordered.…Now it's alphabetical,…it's not in numerical order obviously.…So, five four one three two, that's alphabetical.…And, I can use the insert method…to insert a new element, six.…And you notice that it shows up in alphabetical order there.…