该自动售货系统的功能可分为两类。对于管理员，可建立库存信息，查询商品销售量及销售总额；而对于消费者，可查询商品信息，购买商品等主要功能。(The function of the vending system can be divided into two categories. For the administrator, the inventory information can be established, the sales volume and the total sales amou