#!/usr/bin/env ruby

=begin
 full_adder_cloud0.rb

 Homework problem. Modify the code below so all
 test cases in fa_cloud_test.rb succeed.
=end

# Match a 3 digit binary number and follow rules below:
#   000 => 00
#   001 => 10
#   010 => 10
#   011 => 01
#   100 => 10
#   101 => 01
#   110 => 01
#   111 => 11

# Use cloud matching.
# Simulate cloud with hash array. $ signifies it is a global variable.

$cloud = {
	   '000' => '00',
	   '001' => '10',
	   '010' => '10',
	   '011' => '01',
	   '100' => '10',
	   '101' => '01',
	   '110' => '01',
	   '111' => '11'
	}


def simulate_full_adder(digits)
   result = lookup_in_cloud(digits)
   return result
end

def lookup_in_cloud(lhs)
   lookup = $cloud[lhs]
   return lookup
end