How do I use reverse iterators with std::vector in C++?

How do I use reverse iterators with std::vector in C++?

You can use reverse iterators with std::vector by calling the rbegin() and rend() methods. For example:

#include <vector>
#include <iostream>

int main() {
    std::vector<int> vec = {1, 2, 3, 4, 5};
    for (auto it = vec.rbegin(); it != vec.rend(); ++it) {
        std::cout << *it << ' ';
    }
    return 0;
}

This will print the elements in reverse order.

What are the advantages of using reverse iterators?

Reverse iterators allow you to traverse a container in reverse order without needing to modify the original data structure. This can be useful for algorithms that require processing elements from the end to the beginning.

Can I use reverse iterators with other STL containers?

Yes, reverse iterators can be used with other STL containers like std::deque, std::list, and std::array, as they all provide rbegin() and rend() methods.

Are there any performance considerations when using reverse iterators?

Generally, reverse iterators have similar performance to regular iterators. However, the actual performance can depend on the specific container and the operations being performed.