how to get iterator to a particular position of a vector

Question

Suppose i have a

std::vector<int> v //and ... for(int i =0;i<100;++i)   v.push_back(i); 

now i want an iterator to, let's say 10th element of the vector.

without doing the following approach

std::vector<int>::iterator vi; vi = v.begin(); for(int i = 0;i<10;i++)   ++vi; 

as this will spoil the advantage of having random access iterator for a vector.

Answer 1

This will work with any random-access iterator, such as one from vector or deque:

std::vector<int>::iterator iter = v.begin() + 10; 

If you want a solution that will work for any type of iterator, use next:

std::vector<int>::iterator iter = std::next(v.begin(), 10); 

Or if you're not on a C++11 implementation, advance:

std::vector<int>::iterator iter = v.begin(); std::advance(iter, 10);