4.1 系统功能模块....................................................................................................................................11
4.2 功能模块详细设计............................................................................................................................11
4.2.1 用户登录模块设计.........................................................................................................................11
4.2.2 基本信息模块设计........................................................................................................................12
4.2.3 合同制定模块设计........................................................................................................................13
4.2.4 打印合同设计................................................................................................................................14
4.3 结构化分析........................................................................................................................................14
4.3.1 销售合同信息实体属性图............................................................................................................15
4.3.2 供方信息实体属性图....................................................................................................................15
4.3.3 需方信息实体属性图....................................................................................................................15
4.3.4 系统 E-R 图....................................................................................................................................16
5.1 数据库分析.......................................................................................................................................17
5.2 数据逻辑结构设计...........................................................................................................................17
5.3 数据采集...........................................................................................................................................21
6.1 公用模块设计....................................................................................................................................22
6.2 详细主模块代码设计.......................................................................................................................22
6.2.1 ADO 连接数据库...........................................................................................................................22
6.2.2 查询代码设计................................................................................................................................22
6.2.3 删除模块代码................................................................................................................................24
6.3 详细子模块代码设计.......................................................................................................................24
6.3.1 系统登录模块................................................................................................................................24
6.3.2 销售合同信息模块........................................................................................................................25
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