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ruby 在线工具

#!/usr/bin/ruby -w
#
class Box
attr_accessor :width, :height
#
def initialize(w,h)
@width, @height = w, h
end
#
def getArea
@width * @height
end
end
# 使 new
box1 = Box.new(10, 20)
# 使 allocate
box2 = Box.allocate
# 使 box1
a = box1.getArea()
puts "Area of the box is : #{a}"
# 使 box2
a = box2.getArea()
puts "Area of the box is : #{a}"
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运行结果