Convert iterator to pointer?

Question

I have a std::vector with n elements. Now I need to pass a pointer to a vector that has the last n-1 elements to a function.

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Answer 1

If you can, a better choice may be to change the function to take either an iterator to an element or a brand new vector (if it does not modify).

While you can do this sort of things with arrays since you know how they are stored, it's probably a bad idea to do the same with vectors. &foo[1] does not have the type vector*.

Also, while the STL implementation is available online, it's usually risky to try and rely on the internal structure of an abstraction.