（1）系统以菜单方式工作，执行一次操作后重新显示一次菜单；；
（2）物品信息利用文件保存；
（3）物品信息的录入；
（4）修改物品信息；
（5）删除物品信息；
（6）按条件（id,name,time等）统计物品信息的数量，显示物品信息。
　　 注意：系统自动对各种数据合理性的检查。((1) the system works on the menu, and the menu is redisplayed after the operation.
(2) the use of documents for the preservation of information;
(3) the entry of the information of the goods;
(4) amend the information of the goods;
(5) delete the information of the goods;
(6) according to the condition (ID, name, time, etc.), the quantity of item information is counted, and the information of the goods is displayed.
Note: the system automatically checks the reasonableness of all kinds of data.)