/* cipher.txt documents the caesar library for Caesar cipher 
   encryption.
----------------------------------------------------------------*/

/* caesarEncrypt() implements the Caesar cipher encoding scheme.

   Receive: ch, a character.
            key, the amount by which to rotate ch.
   Return:  The character that is key positions after ch,
            with "wrap-around" to the beginning of the 
            character sequence used for messages.
----------------------------------------------------------------*/
char caesarEncrypt(char ch, int key);

/* caesarDecrypt() implements the Caesar cipher encoding scheme.

   Receive: ch, a character,
            key, an integer.
   Return:  The character that is key positions before ch,
            with "wrap-around" to the end of the character 
            sequence used for messages.
----------------------------------------------------------------*/
char caesarDecrypt(char ch, int key);