Alternative way to process the command line options, using strcmp(3):


	for (; *argv && **argv=='-'; argc--,argv++) {
		cp = *argv;
		if (strcmp(cp, "-") == 0) {
			/* ``-'' is no option but use stdin as first file */
			break;
		} else if (strcmp(cp, "-x") == 0) {
			xflag = 1;
		} else if (strncmp(cp, "-c", 2) == 0) {
			if (cp[2]) {
				word = cp + 2;
			} else if (*++argv) {
				argc--;
				word = *argv;
			} else {
				usage();
			}
		} else {
			fprintf(stderr, "Unknown option `%s'\n", cp);
			usage();
		}
	}