C++: What are the differences between iterators and pointers?

What are the main differences between C++ standard library iterators and pointers?

The main differences include that iterators are abstract and can work with various containers, while pointers are specific to memory addresses.

Can you give me an example of how to use an iterator?

Sure! Here's a simple example using a vector:

#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 iterates through the vector using an iterator.

Are there any performance differences between using iterators and pointers?

Generally, iterators may have a slight overhead due to abstraction, but in most cases, the performance difference is negligible. It often depends on the specific implementation.

When should I prefer using iterators over pointers?

You should prefer iterators when working with standard library containers, as they provide a consistent interface and can work with different types of containers.