blog-boost-program-options-example

boost-program-options-example.cpp

namespace po = boost::program_options;

// Declare the supported options.
po::options_description desc("Allowed options");
desc.add_options()
    ("help", "produce help message")
    ("compression", po::value<int>(), "set compression level")
;

po::variables_map vm;
po::store(po::parse_command_line(ac, av, desc), vm);
po::notify(vm);    

if (vm.count("help")) {
    cout << desc << "\n";
    return 1;
}

if (vm.count("compression")) {
    cout << "Compression level = " << vm["compression"].as<int>() << '\n';
} else {
    cout << "Compression level was not set.\n";
}