First order Recurrence Relations

FORR.rb

# PROJECT: First Order Recurrence Relations
$LOAD_PATH << '../lib'
require 'parseFile.rb'

class Forr 
  
  def initialize(inputs) 
    $s1 =  ( inputs.has_key?('S(1)') && inputs['S(1)'] )
    $c =   ( inputs.has_key?('C') && inputs['C'] )
    $gn =  ( inputs.has_key?('G(N)') && inputs['G(N)'] )
    #puts s1,c,gn
    print
  end
  
  def print
    puts "S(n) = #{$c}^(n-1) * #{$s1} + sigma(#{$c}^(n-1) * #{$gn})"
    unless $gn == 0
      for n in 1..10 do
        i = n
        sigma = 0
        for i in 2..i do
          sigma += ( $c**(n-i) ) *$gn
        end
        puts "S(#{n}) = #{( ( $c**(n-1) ) * $s1 ) + sigma}"
      end
    else
      for n in 1..10
        puts "S(#{n}) = #{( ( $c**(n-1) ) * $s1 ) + $gn}"
      end
    end 
  end
  
end #Class

begin
  parsed = Master::ParseFile.new(Hash)
  if parsed.getFile.instance_of?(Hash) then Forr.new(parsed.getFile) end
end