Index of vector iterator

Question

So I have a basic vector iterator, which looks like:

for (std::vector<string>::iterator i = vec.begin(); i != vec.end(); ++i)
{
    // Need the index here
}

I've tried using &i but that just returns true. I need to return the index. Would I need to create my own integer?

Answer 1

If by 'ID' you mean index, use

i - vec.begin()