iterator erase(iterator it);
iterator erase(iterator first, iterator last);The first member function removes the element of the controlled sequence pointed to by it. The second member
function removes the elements of the controlled sequence in the range [first, last). Both return an iterator that
designates the first element remaining beyond any elements removed, or end() if no such element exists.
Erasing N elements causes N destructor calls and an assignment for each of the elements between the insertion point and
the end of the sequence. No reallocation occurs, so iterators and references become invalid only from the first element
erased through the end of the sequence.
See the related sample program.