Why use iterators instead of array indices?

Question

Take the following two lines of code:

for (int i = 0; i < some_vector.size(); i++)
{
    //do stuff
}

And this:

for (som         


        

Answer 1

The second form represents what you're doing more accurately. In your example, you don't care about the value of i, really - all you want is the next element in the iterator.