void check_file_status(char* filename) {
    std::fstream File;
    File.open(filename, std::fstream::in);
    if (File.fail()) cout << "Failed to open file for read.\n";
    File.close();
    File.open(filename, std::fstream::out | std::fstream::app);
    if (File.fail()) cout << "Failed to open file for write.\n";
    File.close();
    File.open(filename, std::fstream::in | std::fstream::out | std::fstream::app);
    char temp[2] = {0};
    if (!File.fail()) {
        File.seekg(0, std::fstream::end);
        int i = (int)File.tellg();
        cout << "Successfully opened file.\nFile size: " << i << " bytes\n";
        File.seekg(0);
        File.read(temp, 1);
        if (File.fail()) {
            cout << "Opened file for read, but ";
            if (i == 0) cout << "your file is empty.\n";
            else cout << "failed to read from file.\n";
        }
    }
    File.close();
}