价值18万的分布式网络购物系统，现将源码上传-The value of 180,000 to the distributed network system, The source upload

一个不错的一套超市进销存管理系统，作者发布的目的是技术交流，禁止用于商业用途，在VB6下顺利编译。-A good set of supermarket inventory management system, the author is distributed in the technical exchanges, is prohibited for commercial purposes, in VB6 compiled smoothly.

排队论中可以按指数分布的时间间隔产生一个队列，并进入服务时间服从指数分布的服务台，画图得出其到达时间与离开时间，还有每个顾客在系统中的逗留时间(Can produce a queue according to the time interval of exponential distribution in queuing theory, and enter the Business Hours exponentially distributed service station, drawing