Craps!

craps.rb

@roll = []
@pass_line_wins = 0
@pass_line_losses = 0

def roll_finished
  puts @roll.inspect
  puts "Pass line wins #{@pass_line_wins}, pass line losses #{@pass_line_losses}"
  @roll = []
end

def new_roll(point=nil)
  @d1 = rand(6) + 1
  @d2 = rand(6) + 1
  @roll << [@d1, @d2]
  total = @d1 + @d2
  if point.nil? # come out roll
    if [7, 11].include?(total)
      # pass line win
      @pass_line_wins += 1
      roll_finished
    elsif [2, 3, 12].include?(total)
      # pass line lose
      @pass_line_losses += 1
      roll_finished
    else
      # point established
      new_roll(total)
    end
  else
    if total == 7
      # pass line lose
      @pass_line_losses += 1
      roll_finished
    elsif total == point
      # pass line win
      @pass_line_wins += 1
      roll_finished
    else
      new_roll(point)
    end
  end
end

10000.times { new_roll }