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 <set>
#include <algorithm>
#include <iterator>
using namespace std;
int main()
{
set<int> coll;
// insert elements from 1 to 9
for (int i=1; i<=9; ++i) {
coll.insert(i);
}
// print all elements of the collection
copy (coll.begin(), coll.end(),
ostream_iterator<int>(cout," "));
cout << endl;
/* Remove all elements with value 3
* - algorithm remove() does not work
* - instead member function erase() works
*/
int num = coll.erase(3);
// print number of removed elements
cout << "number of removed elements: " << num << endl;
// print all elements of the modified collection
copy (coll.begin(), coll.end(),
ostream_iterator<int>(cout," "));
cout << endl;
}