设计一个超市收银管理程序，要求实现商品管理人员对商品信息（商品号、商品名、单价）进行输入、删除、修改和查询；收银人员录入商品号及购买数量，计算应付钱数，实收钱数和应找钱数；对销售情况进行查询。-Design of a supermarket cash register management process required to achieve product managers for product information (product number, product name, price) for input, delete, modify, and query　checkout Record number of goods and purchase the number of terms to cope with the amount of money, real money and should give change a few numbers　right sales query.