Question7.rb

class SM1
  def initialize
    file = File.exists?('dev.log') ? File.open('dev.log', 'a') : File.new('dev.log', 'a')
    file << 'Just creating ' + self.class.to_s + "\n"
  end
end


class SM2
  def initialize
    @file = File.open('dev.log', 'a')
    @file << 'Just creating ' + self.class.to_s + "\n"
  end
  def say_hi
    puts 'Hi somebody'
    @file << "Just said hi\n"
  end
end

class SM3
  def to_str
    file = File.open('dev.log', 'a')
    msg = "I'm a #{self.class.to_s} hell yeah"
    file << msg
    msg
  end
end

sm1 = SM1.new
sm2 = SM2.new
sm2.say_hi
sm3 = SM3.new
p  sm3.to_str