#include <iostream>
#include <cstdio>
#include <cstring>
#include <cerrno>

int main() {
    FILE* f = fopen("/SomeCrapFile.txt", "w");
    if (!f) {
        std::cout << "File didn't open because " << strerror(errno) << std::endl;
    } else {
        std::cout << "Worked?" << std::endl;
    }
    return 0;
}