great weapon fighting

gwf.rb

def get_avg(die_type, dice_count = 1)                                                                                 
  rolls = 1_000_000                                                                                                   
  avg = (1..rolls).inject(0.0) do |acc, _n|                                                                           
    dice_count.times do                                                                                               
      roll = rand(die_type)                                                                                           
      acc +=  ( (roll < 3) ? rand(die_type) : roll )                                                                  
    end                                                                                                               
    acc                                                                                                               
  end                                                                                                                 
  avg/rolls                                                                                                           
end 

puts "1d12 average = #{get_avg(12)}"                                                                                  
puts "2d6 average = #{get_avg(6, 2)}"                                                                                 
puts "1d10 average = #{get_avg(10)}"