家用电器商店库存操作

商品的库存数据存储在文件store.txt中。从该文件中读取当前的所有库存信息，然后将其存储在一个结构数组中。store.txt文件共分两个部分，第一部分为商品的库存信息，第二部分为对库存的更新数据。

　　本次的设计中包含了文件读取、文件修改、文件保存以及排序。

-Operation of household electrical appliances store inventory goods inventory data is stored on paper in store.txt. In the document, read all the current inventory information, and then stored in a structure array. store.txt document is divided into two parts, the first part of its commercial inventory information, the second part of the updated inventory data. The design includes a document reader, document changes to save the file and the sort.