strrot13 - encrypt or decrypt string using rot13

       Lars Wirzenius (lars.wirzenius@helsinki.fi)

Publib                                        C Programmer's Manual                               STRROT13(3pub)

strrot13  converts  the  argument string using rot13, i.e., it replaces each letter a with n, n with a, b
       with o, o with b, and so on.  Converting twice results in the original string.  Non-letter characters are
       not converted.

       The rot13 encryption method is used commonly on USENET to hide offensive text, or spoilers in discussions
       about movies or books, or in other similar occasions.

       strrot13 - encrypt or decrypt string using rot13

strrot13 returns its argument.

publib(3), crypt(3)

       #include <publib.h>
       char *strrot13(char *str);