C++ List Iterator vs Vector Iterator

What are the main differences between list iterators and vector iterators in C++?

List iterators are used for linked lists, allowing efficient insertions and deletions, while vector iterators are for dynamic arrays, providing fast access but slower insertions.

Can you explain how to use a list iterator in C++?

Sure! To use a list iterator, you first need to include the <list> header, then create a list and an iterator. For example:

#include <list>
#include <iostream>

int main() {
    std::list<int> myList = {1, 2, 3, 4};
    std::list<int>::iterator it;
    for (it = myList.begin(); it != myList.end(); ++it) {
        std::cout << *it << " ";
    }
}

What about vector iterators? How do they differ in usage?

Vector iterators are similar in usage. You include the <vector> header and create a vector. Here's an example:

#include <vector>
#include <iostream>

int main() {
    std::vector<int> myVector = {1, 2, 3, 4};
    std::vector<int>::iterator it;
    for (it = myVector.begin(); it != myVector.end(); ++it) {
        std::cout << *it << " ";
    }
}

Which one should I use for better performance?

It depends on your use case. Use vectors for random access and when you need to store elements contiguously. Use lists when you need frequent insertions and deletions.