ruby 在線工具

#!/usr/bin/ruby -w

class Box
   # 初始化類變量
   @@count = 0
   def initialize(w,h)
      # 給實例變量賦值
      @width, @height = w, h

      @@count += 1
   end

   def self.printCount()
      puts "Box count is : #@@count"
   end
end

# 創(chuàng)建兩個對象
box1 = Box.new(10, 20)
box2 = Box.new(30, 100)

# 調(diào)用類方法來輸出盒子計數(shù)
Box.printCount()