说明：  能够灵活添加新物品，并向用户提供多次购买一次性结帐的功能 1．货物类（Goods）：一个商品，包含了名称，价格信息 2．购物篮类（Basket）：一个购物篮，包含了已经选择的东西 3．Store：小芳便利店 主程序
(flexibility to add new items and provide users with the purchase of several one-time payment of a function. Goods category (Goods) : a commodity, including the name, price information 2. Shopping basket category (Basket) : a shopping cart, already contains a choice of three things. Store : Xiaofang facilitate procedures owner)