The following code example is taken from the book
The C++ Standard Library - A Tutorial and Reference, 2nd Edition
by Nicolai M. Josuttis, Addison Wesley Longman, 2012
Copyright © 2012 by Pearson Education, Inc. and Nicolai M. Josuttis
#include <iostream>
#include <string>
#include <algorithm>
#include <iterator>
#include <set>
using namespace std;
int main()
{
// create a string set
// - initialized by all words from standard input
set<string> coll((istream_iterator<string>(cin)),
istream_iterator<string>());
// print all elements
copy (coll.cbegin(), coll.cend(),
ostream_iterator<string>(cout, "\n"));
}