C++11: Iterator vs Indexing

What are the main differences between using iterators and indexing in C++11?

Iterators provide a more abstract way to traverse containers, while indexing directly accesses elements by their position.

Can you give me an example of using an iterator in C++11?

Sure! Here's a simple example:

#include <vector>
#include <iostream>

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

This code uses an iterator to print each element in the vector.

What are the advantages of using iterators over indexing?

Iterators are more flexible and can work with different types of containers, while indexing is limited to arrays and vectors.

Are there any performance differences between the two methods?

In general, both methods have similar performance, but iterators can be more efficient for certain container types due to optimizations.