本需求说明书是对超市销售系统的进行详细地需求分析，对系统的功能和性能进行了整体的规划。为系统的实现和系统的测试提供一个具体的参-The requirements specification is a supermarket distribution system for a detailed needs analysis, system functionality and performance of the overall planning. For the system implementation and testing of the system to provide a specific reference