C++ vector to pointer of pointers

Question

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

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

Answer 1

Well, you can convert a vector to a const pointer-to-array using the c_str() member function.

EDIT: Oops! I meant &vec[0]. It's been a long day.

Answer 2

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