What are iterators in C++ collections?

Can you explain what iterators are in C++ collections?

Sure! Iterators are objects that allow you to traverse through the elements of a collection, like arrays or lists, in C++.

How do I use iterators with a vector?

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

std::vector<int> vec = {1, 2, 3};
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, allow for easy traversal, and can work with different types of collections without needing to know their internal structure.

Can you give me an example of a custom iterator?

Certainly! A custom iterator can be created by defining a class that overloads the ++, *, and != operators. This allows you to define how your iterator behaves.