根据需求分析的描述，以及与第三…
代码说明：
根据需求分析的描述以及与用户的沟通，系统实现目标如下： 界面设计简洁、友好、美观大方。 操作简单、快捷方便 数据存储安全、可靠。 信息分类清晰、准确。 强大的查询功能，保证数据查询的灵活性。 提供销售排行榜，为管理员提供真实的数据信息。 提供灵活、方便的权限设置功能，使整个系统的管理分工明确。 对用户输入的数据，系统进行严格的数据检验，尽可能排除人为的错误。 -According to the description of needs analysis, as well as communication with the user, the system to achieve the following goals: interface design of simple, friendly, generous appearance. simple, fast and convenient data storage safe and reliable. Information classification clear and accurate. powerful query functions, and ensure the flexibility of data query. sales chart for the data manager to provide true information. provide a flexible and convenient feature set permissions so that the management of the entire system a clear division of labor. on data entered by the user, the system data strict examination, rule out the possibility of human e
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