How do I merge two lists in C++?

How do I merge two lists in C++?

You can merge two lists in C++ using the std::list container and the merge() function. Would you like a code example?

Yes, please provide a code example.

Here's a simple example:

#include <iostream>
#include <list>

int main() {
    std::list<int> list1 = {1, 3, 5};
    std::list<int> list2 = {2, 4, 6};

    list1.merge(list2);

    for (int n : list1) {
        std::cout << n << ' ';
    }
    return 0;
}

This will merge list2 into list1.

What happens if the lists are not sorted?

If the lists are not sorted, the merge() function will not work as intended. It assumes both lists are sorted. You might want to sort them first using list1.sort() and list2.sort() before merging.