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#!/usr/bin/ruby -w
class Box
   # 初始化类变量
   @@count = 0
   def initialize(w,h)
      # 给实例变量赋值
      @width, @height = w, h
      @@count += 1
   end
   def self.printCount()
      puts "Box count is : #@@count"
   end
end
# 创建两个对象
box1 = Box.new(10, 20)
box2 = Box.new(30, 100)
# 调用类方法来输出盒子计数
Box.printCount()
 
 
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