What are C++ standard library iterators?

Can you explain what C++ standard library iterators are?

C++ standard library iterators are objects that allow you to traverse the elements of a container, like arrays or vectors, without exposing the underlying structure.

How do they differ from regular pointers?

While pointers can be used to access elements, iterators provide a more abstract way to navigate containers, supporting various types of data structures.

Can you give me an example of using an iterator with a vector?

Sure! You can use a for loop with an iterator like this: std::vector<int> vec = {1, 2, 3}; for(auto it = vec.begin(); it != vec.end(); ++it) { std::cout << *it << ' '; }.

What are some common types of iterators in C++?

Common types include input iterators, output iterators, forward iterators, bidirectional iterators, and random access iterators.