#include <stdio.h> /* for printf */
#include <unistd.h> /* for exit */
#include <getopt.h>

int main(int argc, char *argv[])
{
	int c;

	while(1) {
		c = getopt(argc, argv, "abc"); /* "abc" is an option list */

		if (c == -1)
			break;

		switch (c) {
		case 'a': /* drop */
		case 'b': /* drop */
		case 'c': /* drop */
			printf("%c option\n", c);
			break;
		default:
			break;
		}
	}

	/* argc and argv are not affected by parsing */
	while (argc > 0) {
		printf ("%s ", argv[0]);
		--argc;
		++argv;
	}
	printf("\n");

	exit(0);
}