The following code example is taken from the book
The C++ Standard Library - A Tutorial and Reference
by Nicolai M. Josuttis, Addison-Wesley, 1999
© Copyright Nicolai M. Josuttis 1999
#include <iostream>
#include <string>
#include <algorithm>
#include <iterator>
#include <vector>
using namespace std;
int main()
{
/* create a string vector
* - initialized by all words from standard input
*/
vector<string> coll((istream_iterator<string>(cin)),
istream_iterator<string>());
// sort elements
sort (coll.begin(), coll.end());
// print all elements ignoring subsequent duplicates
unique_copy (coll.begin(), coll.end(),
ostream_iterator<string>(cout, "\n"));
}