<span style="font-size:1.0em">

require 'motorcycle'  

 m = MotorCycle.new('Yamaha', 'red')  

m.startEngine  

class MotorCycle  

def dispAttr  

 puts 'Color of MotorCycle is ' + @color  

  puts 'Make  of MotorCycle is ' + @make  

  end  

 end  

 m.dispAttr  

 m.startEngine  

puts self.class  

 puts self  </span>

<span style="font-size:1.0em">self.class</span>

<span style="font-size:1.0em">self</span>

<span style="font-size:1.0em">

require 'p029dog.rb'  

 # define class Dog  

 class Dog  

  def big_bark  

  puts 'Woof! Woof!'  

 end  

 end  

 # make an object  

 d = Dog.new('Labrador', 'Benzy')  

 d.bark  

d.big_bark  

 d.display  </span>

<span style="font-size:1.0em">

class String  

 def writesize  

  puts self.size  

 end  

 end  

 size_writer = "Tell me my size!"  

size_writer.writesize  </span>