#include <stdio.h>

main(argc, argv)
	int argc;
	char *argv[];
{
	char progname[20];
	strncpy(progname, argv[0], 20);
	while (argc > 1 && argv[1][0] == '-') {
		switch (argv[1][1]) {
		case 'h':
			fprintf(stderr, "help option is selected.\n");
			break;
		default:
			fprintf(stderr, "%s: unknown arg %s\n",
				progname, argv[1]);
			exit(1);
		}
		argc--;
		argv++;
	}
	exit(0);
}