qbrating.rb

main.rb

require 'qbrating'

#Order: Completions, Attempts, Yards Completed, TDs, Interceptions
qb = QBRating.new(26,45,212,4,1)
puts "\nThe QB Rating is #{qb}."

qbrating.rb

class QBRating

  attr_accessor :rating

  def initialize(comp,att,yards,td,int)
    @rating = ((rule1(att,comp) + rule2(yards,att) + rule3(td,att) + rule4(int,att)) / 6) * 100
  end
 
  def to_s
    @rating = "%3.1f" % @rating
  end
 
  private
 
  def rule1(att,comp)
    return check_boundary(((comp.to_f / att.to_f * 100) - 30.0) * 0.05)
  end
 
  def rule2(yards,att)
    return check_boundary(((yards.to_f / att.to_f) - 3.0) * 0.25)
  end
 
  def rule3(td,att)
    return check_boundary(td.to_f / att.to_f * 100 * 0.2)
  end
 
  def rule4(int,att)
    return check_boundary(2.375 - (int.to_f / att.to_f * 100 * 0.25))
  end
 
  def check_boundary(part)
    if part < 0
      part = 0
    elsif part > 2.375
      part = 2.375
    end
    return part
  end
 
end