getopt.c

        case '3':
        case '4':
        case '5':
        case '6':
        case '7':
        case '8':
        case '9':
           if (digit_optind != 0 && digit_optind != this_option_optind)
              printf("digits occur in two different argv-elements.\n");
           digit_optind = this_option_optind;
           printf("option %c\n", c);
           break;

        case 'a':
           printf("option a\n");
           break;

        case 'b':
           printf("option b\n");
           break;

        case 'c':
           printf("option c with value `%s'\n", optarg);
           break;

        case '?':
           break;

        default:
           printf("?? getopt returned character code 0%o ??\n", c);
      }
   }

   if (optind < argc)
   {
      printf("non-option ARGV-elements: ");
      while (optind < argc)
         printf("%s ", argv[optind++]);
      printf("\n");
   }

   exit(0);
}

#endif /* TEST */