source: testjes/testgetopt.cpp @ 10

#include <iostream>
#include <getopt.h>
int main(int argc, char*argv[])
{
  std::string programname = "prog";
  static struct option long_options[] =
    {
      {"help",     0, 0, 'h'},
      {"pool",     1, 0, 'p'},
      {"version",  0, 0, 'v'},
      {"multi",    0, 0, 'm'},
      {"file",     1, 0, 'f'},
      {0,          0, 0, 0}
    };

  while (1)
  {
    int c = getopt_long(argc,argv,"-hp:vmf:",long_options,0);
    if (c == -1)
    {
      if (optind < argc)  // unexpected extra argument
      {
        std::cerr << programname << ": Unexpected argument:" << argv[optind] << std::endl;
        return 1;
      }
      break;
    }
    if ( c == '?' || c == ':' )
    {
      std::cerr << "Invalid parameter, try "<< argv[0]<<" --help " <<std::endl;
      return 1;
    }
    switch(c)
    {
      case 'h': 
                std::cerr << (char)c << ":" << std::endl;
                break;
      case 'p': 
                std::cerr << (char)c << ":" << optarg << std::endl;
                break;
      case 'f': 
                std::cerr << (char)c << ":" << optarg << std::endl;
                break;
      case 'v': 
                std::cerr << (char)c << ":" << std::endl;
                break;
      case 'm':
                std::cerr << (char)c << ":" << std::endl;
                break;
      case 1:
                std::cerr << c << ":" << optarg << std::endl;
                break;
    }

  }
  return 0;
}