C ++ vector for pointer pointers

Question

Is there a way to convert a vector to a pointer to a pointer (ptr-to-ptr).

Background: I have an arbitrary set of data stored in a vector. But I have a library of algorithms that accept ptr-to-ptr (for accessing an array of images). I need to get data from my vector in ptr-to-ptr. How is this possible?

Answer 1

If you have a function void f(int **array)and a vector std::vector<int*> vect, you can call f as follows: f(&vect[0]). Is this what you were looking for?

Answer 2

Well, you can convert a vector into a const pointer into an array using a member function c_str().

EDIT: ! &vec[0]. .