【摘要】 用BASIC语言在CROMEMCO.Z—80微型机系统上开发的实际的管理信息系统为例,分析了平面文件和某些文件系统其他功能上的弱点与管理信息系统开发中提出来的对具有较复杂的逻辑关系的数据进行处理的矛盾,提出了基于文件功能,根据层次结构或者“系”的思想组织逻辑文件的方法,以减少空间开销,提高查询速度。更多还原

【Abstract】 The article takes a practical management information system developed on microcomputer Cromemco z-80 in Basic language as an example to analyze the contradiction between the weakness of planar files and other functions of certain file systems and the processing of data with comparatively complicated logic relations. The article puts forth a method of arranging logic files based on the functions of files and the idea of hierachical structure or "sets" to save space and hasten thn speed of inquiring.更多还原