多態練習

• 練習

  ---

  '''
  1）.房子類 有戶型，總面積和傢俱名稱列表[]
        新房子沒有任何的傢俱
       def __init__(self,hx,area):
          self.hx=hx
          self.area= area
          self.lists=[]
      添加傢俱
      add_furniture(self,furniture):
      
      展示方法：show(self)
      戶型
      剩餘
      放了哪些傢俱
          
  2) .傢俱類 有名字和佔地面積屬性，
      class Furniture:
          ....
          
      class Bed(Furniture):
          ....
          
      class Desk(Furniture):
         ....
      ...
     創建傢俱對象：
      		牀：佔4平米
      		衣櫃：佔2平面
      		餐桌：佔1.5平米
  3）.將以上三件傢俱添加到房子中
  4）.打印房子時，要求輸出:戶型，總面積，剩餘面積，傢俱名稱列表
  
  '''
  

  ---

  class House:
      def __init__(self, hx, area):
          self.hx = hx
          self.area = area
          self.lists = []
  
      # 添加傢俱
      def add_furniture(self, furniture):  # furniture = table
          if isinstance(furniture, Furniture):
              # 添加到傢俱列表
              self.lists.append(furniture)
              # 從總面積減去傢俱的面積
              self.area -= furniture.area
              print('添新傢俱了')
          else:
              print('不能隨便往家裏搬哦！')
  
      # 展示
      def show(self):
          print('戶型:', self.hx)
          print('剩餘面積:', self.area)
          print('傢俱如下:')
          for f in self.lists:
              print(f)
  
  
  class Furniture:
      def __init__(self, name, area):
          self.name = name
          self.area = area
  
      def __str__(self):
          return self.name + '佔用面積:' + str(self.area)
  
  
  class Bed(Furniture):
      pass
  
  
  class Table(Furniture):
      pass
  
  
  class Robe(Furniture):
      pass
  
  
  bed = Bed('牀', 4)
  
  table = Table('桌子', 1.5)
  
  robe = Robe('衣櫃', 12)
  
  
  house = House('2室一廳', 88)
  
  house.add_furniture(bed)
  house.add_furniture(table)
  house.add_furniture(robe)
  
  house.show()