#include <iostream.h> #include <stl.h> int main () { set<int, less<int> > s; pair<set<int, less<int> >::const_iterator, bool> p; p = s.insert (42); if (p.second) cout << "Inserted new element " << *(p.first) << endl; else cout << "Existing element = " << *(p.first) << endl; p = s.insert (42); if (p.second) cout << "Inserted new element " << *(p.first) << endl; else cout << "Existing element = " << *(p.first) << endl; return 0; }