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