## Function
Program passwd.c is a program for password encryption.
## The following is the execution examples.
$ ./passwd
Usage : ./passwd real_password [crypted_password]
$ ./passwd anypasswordstring
saltc = aC
aCe0DjjrqnxcA
$ ./passwd anypasswordstring aCe0DjjrqnxcA
Password is Good.
$ ./passwd anypasswordstring aCe0Djjrqnxc
Password is Bad.
