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- // Copyright Vladimir Prus 2002-2004.
- // Distributed under the Boost Software License, Version 1.0.
- // (See accompanying file LICENSE_1_0.txt
- // or copy at http://www.boost.org/LICENSE_1_0.txt)
- /* The simplest usage of the library.
- */
- #include <boost/program_options.hpp>
- namespace po = boost::program_options;
- #include <iostream>
- #include <iterator>
- using namespace std;
- int main(int ac, char* av[])
- {
- try {
- po::options_description desc("Allowed options");
- desc.add_options()
- ("help", "produce help message")
- ("compression", po::value<double>(), "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 0;
- }
- if (vm.count("compression")) {
- cout << "Compression level was set to "
- << vm["compression"].as<double>() << ".\n";
- } else {
- cout << "Compression level was not set.\n";
- }
- }
- catch(exception& e) {
- cerr << "error: " << e.what() << "\n";
- return 1;
- }
- catch(...) {
- cerr << "Exception of unknown type!\n";
- }
- return 0;
- }
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