What are the different types of iterators in C++?

What are the different types of iterators in C++?

In C++, there are several types of iterators: input iterators, output iterators, forward iterators, bidirectional iterators, and random access iterators. Each type has its own characteristics and use cases.

Can you explain the difference between forward and bidirectional iterators?

Sure! Forward iterators can only move in one direction (forward), while bidirectional iterators can move both forward and backward through a container.

What are some examples of containers that use these iterators?

Examples of containers that use forward iterators include std::forward_list and std::list, while std::vector and std::deque support random access iterators.

How do I implement a custom iterator in C++?

To implement a custom iterator, you need to define a class that overloads the necessary operators (like ++, *, and !=) and maintains the state of the iteration.