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

For example, my vector foo contains (5,2,6,87,251). A function takes vector* and I want to pass it a pointer to (2,6,87,251).

A pointer to a vector is not at all the same thing as a pointer to the elements of the vector.

In order to do this you will need to create a new vector with just the elements you want in it to pass a pointer to. Something like:

 vector tempVector( foo.begin()+1, foo.end());

 // now you can pass &tempVector to your function

However, if your function takes a pointer to an array of int, then you can pass &foo[1].