const char *mode;
    const char *device_path;
    const char *file_path;
    int bytes = 0;
    int position = 0;


    std::set<char> parms;



    for (int i = 1; i <= (argc - 1); i++)
    {
        if (std::string(argv[i]) == "-m")
        {
            if (mode != nullptr)
            {
                std::cerr << argv[i] << " overload!";
                return 1;
            }

            if ((i + 1) > (argc - 1))
            {
                std::cerr << "Incorrect parameter usage!\n";
                getchar();
                return 1;
            }

            mode = argv[i + 1];
            parms.insert('m');

            std::cout << "mode = " << mode << std::endl;
            getchar();
        }


        else if (std::string(argv[i]) == "-d")
        {
            if (device_path != nullptr)
            {
                std::cerr << argv[i] << " overload!";
                return 1;
            }

            if ((i + 1) > (argc - 1))
            {
                std::cout << "error, no value found";
                getchar();
                return 1;
            }


            device_path = argv[i + 1];
            parms.insert('d');
            std::cout << "device = " << device_path << std::endl;
            getchar();
        }
        else if (std::string(argv[i]) == "-f")
        {
            if (file_path != nullptr)
            {
                std::cerr << argv[i] << " overload!";
                return 1;
            }

            if ((i + 1) > (argc - 1))
            {
                std::cout << "error, no value found";
                getchar();
                return 1;
            }


            file_path = argv[i + 1];
            parms.insert('f');
            std::cout << "file = " << file_path << std::endl;
            getchar();
        }
        else if (std::string(argv[i]) == "-b")
        {
            if (bytes != 0)
            {
                std::cerr << argv[i] << " overload!";
                return 1;
            }

            if ((i + 1) > (argc - 1))
            {
                std::cout << "error, no value found";
                getchar();
                return 1;
            }

            try {
                bytes = std::stoi(argv[i + 1]);//, &sz);
            }
            catch (std::invalid_argument)
            {
                std::cerr << "invalid argument!";
                return 1;
            }
            catch (std::out_of_range)
            {
                std::cerr << "Number too big!";
                return 1;
            }



            parms.insert('b');
            std::cout << "bytes = " << bytes << std::endl;
            getchar();
        }
        else if (std::string(argv[i]) == "-p")
        {
            if (position != 0)
            {
                std::cerr << argv[i] << " overload!";
                return 1;
            }

            if ((i + 1) > (argc - 1))
            {
                std::cout << "error, no value found";
                getchar();
                return 1;
            }

            try {
                position = std::stoi(argv[i + 1]);//, &sz);
            }
            catch (std::invalid_argument)
            {
                std::cerr << "invalid argument!";
                return 1;
            }
            catch (std::out_of_range)
            {
                std::cout << "Number too big!";
                return 1;
            }

            parms.insert('p');
            std::cout << "position = " << position << std::endl;
            getchar();
        }
    }