#include <lemon/arg_parser.h>

 using namespace lemon;

 int main(int argc, char **argv)

 {

   ArgParser ap(argc,argv);

   int i;

   std::string s;

   double d;

   bool b,sil;

   bool g1,g2,g3;

   ap.option("n", "an integer input", i, true)

     .option("val", "a double input", d)

     .synonym("vals","val")

     .option("name", "a string input", s)

     .option("f", "a switch", b)

     .option("nohelp", "", sil)

     .option("gra","Choise A",g1)

     .option("grb","Choise B",g2)

     .option("grc","Choise C",g3)

     .optionGroup("gr","gra")

     .optionGroup("gr","grb")

     .optionGroup("gr","grc")

     .mandatoryGroup("gr")

     .onlyOneGroup("gr")

     .other("infile","The input file")

     .other("...");

   ap.parse();

   std::cout << "Parameters of '" << ap.commandName() << "':\n";

   if(ap.given("n")) std::cout << "  Value of -n: " << i << std::endl;

   if(ap.given("val")) std::cout << "  Value of -val: " << d << std::endl;

   if(ap.given("name")) std::cout << "  Value of -name: " << s << std::endl;

   if(ap.given("f")) std::cout << "  -f is given\n";

   if(ap.given("nohelp")) std::cout << "  Value of -nohelp: " << sil << std::endl;

   switch(ap.files().size()) {

   case 0:

     std::cout << "  No file argument was given.\n";

     break;

   case 1:

     std::cout << "  1 file argument was given. It is:\n";

     break;

   default:

     std::cout << "  "

 	      << ap.files().size() << " file arguments were given. They are:\n";

   }

   for(unsigned int i=0;i<ap.files().size();++i)

     std::cout << "    '" << ap.files()[i] << "'\n";

 }