How can I modify a list using iterators in C++11?

How can I modify a list using iterators in C++11?

In C++11, you can use the std::list iterator to modify elements. You can use the iterator to traverse and change values.

Can you show me a code example?

Sure! Here's a simple example:

#include <iostream>
#include <list>

int main() {
    std::list<int> myList = {1, 2, 3, 4, 5};
    for (auto it = myList.begin(); it != myList.end(); ++it) {
        *it *= 2; // Modify the value by multiplying by 2
    }
    for (const auto& value : myList) {
        std::cout << value << " ";
    }
    return 0;
}

What happens if I try to modify the list while iterating?

If you modify the list structure (like adding or removing elements) while iterating, it can invalidate the iterator and lead to undefined behavior. It's best to avoid such modifications during iteration.

Are there any best practices for using iterators?

Yes! Always ensure that your iterators are valid, avoid modifying the container while iterating, and consider using std::for_each for cleaner code.