adder0-with-logger.rb

class HalfAdder
  attr_reader :sum, :carry

  def initialize(augend, addend, logger)
    @augend, @addend, @logger = augend, addend, logger
  end

  def compute
    @carry = @augend & @addend
    @sum = @augend ^ @addend
    @logger.info "augend: #{@augend}"
    @logger.info "addend: #{@addend}"
    @logger.info "carry:  #{@carry}"
    @logger.info "sum:    #{@sum}"
  end
end