ROT Cipher

A ROT cipher (and decipher) in C. Reads input from STDIN and writes to STDOUT. It (de)ciphers characters from space (0x20) to ~ (0x7E).

Usage

Usage:
rot [-c | -d] [-r number] < STDIN > STDOUT

• -c - ciphers the input
• -d - deciphers the input
• -n number - how many characters to shift

Testing

Compile tests with make test and run ./test. If all goes well, it'll say "Tests OK!". If not, it'll greet you with assertion failures.

License

See the LICENSE file for license rights and limitations (MIT).