if (argc) {
input = fopen (argv[0], "r");
if (input == NULL) {
fprintf (stderr, "Error opening %s for reading: %s\n",
argv[0], strerror (errno));
if (argc) {
input = fopen (argv[0], "r");
if (input == NULL) {
fprintf (stderr, "Error opening %s for reading: %s\n",
argv[0], strerror (errno));