int opt;
        int portnum;
        po::options_description desc("Allowed options");
        desc.add_options()
            ("help", "produce help message")
            ("wav", po::value< vector<string> >(),"xxx")
            ("word", po::value< vector<string> >(),"yyy")
            ("d", po::value< vector<string> >(),"ddd")       
            ;

        po::variables_map vm;       
        po::store(po::parse_command_line(argc, arg, desc), vm);
        po::notify(vm);   


        if (vm.count("help")) {
            cout << "Usage: options_description [options]\n";
            cout << desc;
            return 0;
        }

        if (vm.count("wav"))
        {
            // want to connect the words together , but fail.
            string wavdir;
            vector<string>::const_iterator i= vm["wav"].as< vector<string> >().begin();
            vector<string>::const_iterator e= vm["wav"].as< vector<string> >().end();
            for(; i!=e; ++i)
            {
                wavdir.append( (*i) );
                wavdir.append(" ");
            }

            cout << "wav:["  << wavdir << "]\n";

        }

        if (vm.count("word"))
        {   
            // want to connect the words together , but fail.
            string words;
            vector<string>::const_iterator i= vm["word"].as< vector<string> >().begin();
            vector<string>::const_iterator e= vm["word"].as< vector<string> >().end();
            for(; i!=e; ++i)
            {
                words.append( (*i) );
                words.append(" ");
            }

            cout << "words:["  << words << "]\n";
        }
           
        if (vm.count("d"))
        {   
            // want to connect the words together , but fail.
            string d;
            vector<string>::const_iterator i= vm["d"].as< vector<string> >().begin();
            vector<string>::const_iterator e= vm["d"].as< vector<string> >().end();
            for(; i!=e; ++i)
            {
                d.append( (*i) );
                d.append(" ");
            }

            cout << "d:["  << d << "]\n";
        }