This implementation of bc is based on ANTLR.
Self education.
Be compatible with Pirate and Pugs. Switch to Perl6 after Gary Evans has made a Perl6 backend for ANTLR.
http://www.funet.fi/pub/doc/posix/p1003.2/d11.2/4.3 http://en.wikipedia.org/wiki/Bc_%28Unix%29 http://parrotcode.org http://pugscode.org http://pirate.tangentcode.com/ http://www.javadude.com/articles/antlrtut/
To install Ruby, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Ruby
CPAN shell
perl -MCPAN -e shell install Ruby
For more information on module installation, please visit the detailed CPAN module installation guide.