CaeserFile

About

Writing a caeser cipher is fairly trivial, but fun to do if you’re learning the language. I wrote this to get to grips with Haskell’s GetOpt, as well as to see how nice I could make the stream processing. You might find it handy if you’re just starting haskell, and the code is fairly clean (though quite simple).

Download

Download CaeserFile.tar.gz.

Usage

Once compiled (use make & ghc), run the binary with --help as the argument to get help from the helpful help:

$ ./cf --help
Usage: cf [OPTIONS...]
  -v       --version      show version number
  -h       --help         Output help text
  -s NUM   --shift=NUM    The Caeser cipher shift
  -i FILE  --input=FILE   File to read message from (defaults to stdin)
  -o FILE  --output=FILE  File to write output to (defaults to stdout)