CXXOPTS example code

    #include <cxxopts.hpp>
    #include <string>


int main(int argc, const char *argv[])
{
    cxxopts::Options options("Application name", "Application description");

    options.add_options()
        ("h,help", "show help")
        ("f,file", "file name", cxxopts::value<std::string>())
        ("v,verbose", "verbose output", cxxopts::value<bool>()->default_value("false"))
        ;

    auto result = options.parse(argc, argv);

    if (result.count("help"))
    {
        std::cout << options.help() << "\n";
        return EXIT_FAILURE;
    }

    if (result.count("file") < 1)
    {
        std::cout << options.help() << "\n";
        return EXIT_FAILURE;
    }

    std::string fileName = result["file"].as<std::string>();

    return EXIT_SUCCESS;
}