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目 录
1.项目背景.......................................................................................................................................................1
1.1 选题背景............................................................................................................................................1
1.2 系统目标和实现技术.......................................................................................................................1
2.需求分析.......................................................................................................................................................2
2.1 业务流程分析....................................................................................................................................2
2.1.1 车辆信息查询.........................................................................................................................2
2.1.2 创建车辆租借记录 ................................................................................................................3
2.1.3 车辆归还.................................................................................................................................4
2.1.4 续租 .........................................................................................................................................5
2.2 数据流程分析....................................................................................................................................7
2.2.1 汽车租借系统的顶层数据流程图 .......................................................................................7
2.2.2 汽车租借系统第二层数据流程图 .......................................................................................8
2.3 数据字典............................................................................................................................................9
2.3.1 数据流的描述.........................................................................................................................9
2.3.2 处理逻辑的描述..................................................................................................................10
2.3.3 数据存储的描述..................................................................................................................11
3.概念结构设计 ............................................................................................................................................12
3.1CDM 图............................................................................................................................................12
4.逻辑结构设计 ............................................................................................................................................13
4.1PDM 图............................................................................................................................................13
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