C++ STL Vectors: Get iterator from index?
Solution 1:
Try this:
vector<Type>::iterator nth = v.begin() + index;
Solution 2:
way mentioned by @dirkgently ( v.begin() + index ) nice and fast for vectors
but std::advance( v.begin(), index ) most generic way and for random access iterators works constant time too.
EDIT
differences in usage:
std::vector<>::iterator it = ( v.begin() + index );
or
std::vector<>::iterator it = v.begin();
std::advance( it, index );
added after @litb notes.