#!/usr/bin/ruby
# gcalc - command-line interface for Google calculator
# 26aug2008 chneukirchen / revised 06aug2010, 23dec2012 / public domain
require 'open-uri'
q = ARGV.join(" ").gsub(/./m) { "%%%02X" % $&.unpack("C").first }
html = open("http://www.google.com/search?q=#{q}").read
puts (html[%r{<h2 class="r".*?>(.*?)</h2>}, 1] || 'not a calculation').
gsub(%r{<sup>(.*?)</sup>}, '^\\1 ').
gsub(%r{&#215;}, '*')