# define a class
class Box
   # constructor method
   def initialize(w,h)
      @width, @height = w, h
   end
 
   # accessor methods
   def getWidth
      @width
   end
   def getHeight
      @height
   end
 
   # setter methods
   def setWidth=(value)
      @width = value
   end
   def setHeight=(value)
      @height = value
   end
end
 
# create an object
box = Box.new(10, 20)
 
# let us freez this object
box.freeze
if( box.frozen? )
   puts "Box object is frozen object"
else
   puts "Box object is normal object"
end
 
# now try using setter methods
box.setWidth = 30
box.setHeight = 50
 
# use accessor methods
x = box.getWidth()
y = box.getHeight()
 
puts "Width of the box is : #{x}"
puts "Height of the box is : #{y}"