set.delete
// erasing from set
#include <iostream>
#include <set>
int main ()
{
std::set<int> myset;
std::set<int>::iterator it;
// insert some values:
for (int i=1; i<10; i++) myset.insert(i*10); // 10 20 30 40 50 60 70 80 90
it = myset.begin();
++it; // "it" points now to 20
myset.erase (it);
myset.erase (40);
it = myset.find (60);
myset.erase (it, myset.end());
std::cout << "myset contains:";
for (it=myset.begin(); it!=myset.end(); ++it)
std::cout << ' ' << *it;
std::cout << '\n';
return 0;
}