$ diff q_md5sum.c md5sum.c 
555d554
<   int quiet = 0;
566c565
<   while ((opt = getopt_long (argc, argv, "qbctw", long_options, NULL)) != -1)
---
>   while ((opt = getopt_long (argc, argv, "bctw", long_options, NULL)) != -1)
586,588d584
<         case 'q':
<           quiet = 1;
<           break;
658d653
<               if (!quiet) {
676d670
<               }