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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;

}