What are iterators in C++?

What are iterators in C++?

Iterators are objects that allow you to traverse through the elements of a container in C++. They provide a way to access elements without exposing the underlying structure.

Can you explain the different types of iterators?

Sure! There are several types of iterators in C++: input iterators, output iterators, forward iterators, bidirectional iterators, and random access iterators. Each type has its own capabilities and use cases.

How do I use iterators with vectors?

You can use iterators with vectors by calling the begin() and end() methods. For example:

std::vector<int> vec = {1, 2, 3, 4};
for (auto it = vec.begin(); it != vec.end(); ++it) {
    std::cout << *it << ' ';
}

What are the advantages of using iterators?

Iterators provide a uniform way to access elements, improve code readability, and allow algorithms to work with different container types without modification.