Question

Is there a way that I can get the count number for an iterator?

so if at first I had this:

for (int i = 0; iter < agents.size(); ++i)
{
    agents[i]->Index(i);
}

bearing in mind that Index() sets an integer, how would I do this with iterators?

for (std::vector<Agent*>::iterator iter = agents.begin(); iter < agents.end(); ++iter)
{
    (*iter)->Index(????)
}

Answer 1

You want distance http://www.cplusplus.com/reference/std/iterator/distance/

(*iter)->Index(distance(agents.begin(),iter));