Compute md5 value of file or string.
Try the following:
$ gcc main_md5.c md5.c -Wall -o md5_test
$ ./md5_test
// you may get following:
[file - md5.c] md5 value:
2a2caf52cb298f177a57a3211213e141
[string - [email protected]] md5 value:
84701974fb98315895e3ed9053a0b389
// and you can check by md5sum
$ md5sum md5.c
2a2caf52cb298f177a57a3211213e141 md5.c
// Last: 16-digit md5 is the middle of 32-digit md5