源码描述：
这是一款功能比较完整的，基于三层架构的超市管理系统，主要功能如下：
1、进货管理
主要包括了采购进货、退货、财务往来、采购单据查询、库存查询等主要功能
2、销售管理
主要包括了商品销售信息、顾客退货、库存查询等主要功能(Source descr iption:
This is a complete function of the supermarket management system based on the three tier structure. The main functions are as follows:
1. Purchase management
It mainly includes main functions such as purchase, return, financial transactions, purchase documents inquiry, stock inquiry and so on.
2. Sales management
It mainly includes main functions such as sales information, customer return, stock inquiry and so on.)