#include <iostream>
#include <cerrno>
#include <fcntl.h>

int main() {
    std::vector<int> items;
    items.push_back(1);
    items.push_back(2);
    items.push_back(3);

    for (const auto &item: items) {
        std::cout << "Item: " << item << std::endl;
    }

    std::cout << "&errno = " << &errno << std::endl;
    std::cout << "errno = " << errno << std::endl;
    open("/xxxsaa", 0, 0);
    std::cout << "errno = " << errno << std::endl;

    return 0;
}