Is a file with a few lines of data written to it using the write function , each line containing a string in quotations and a number separated by a comma , for example : " hello " , 234 函数写入的带有几行数据的文件；也就是说，每一行都包含引在引号中的字符串和由逗号分隔的数字，例如， （ " hello " , 234 ） 。
Here we have not considered the sychnronizing latency if write and read clocks are asynchronous . greater the synchronizing latency , higher the fifo size requirement to buffer more additional data written 这里，我们没有考虑由于异步读写需要同步，所引入的延时。越大的延时，需要越大的fifo来缓冲更多和写数据。
In this tool , the design of the processor is the main part , including the fore - part of the processor , that is the data reading part and the hind - part of it . that is the data writing part , at the same time , we also have designed the friendly user interface under windows operating system . through the processor , this tool has ultimately accomplished the data exchange for three - dimensional ship drawings between different cax systems , such as tribonml and cadds5 or other systems which support iges standard 本文开发和研制了船舶图形dxf文件到iges文件数据交换的具体实施工具，其中处理器的设计是主体部分(包括处理器前部分即读数据部分和处理器后部分即写数据部分) ，同时也设计了windows操作系统下友好的用户界面，此实施工具通过处理器最终实现了三维船舶结构图在tribonm1和cadds5i或其它支持iges标准的不同cax系统之间的数据交换。
This paper using maplnfo geographic information system tool , ms access database system and vb programming language , combining plentiful professional knowledge , through integrated second development , deeply analyses processing technology of several typical urban road traffic information in gis , designs and realizes data write , data maintenance , data inquire , analyse and process , data print and so on , processes spatial data and attribute data of urban road traffic information correlative , and according to the need of geographical information system , divides all the urban traffic management business into four systems , include traffic basic facilities management system , public transit management system , traffic survey management system , traffic order management system , every system has several sub - systems , thus dctailizc urban road traffic management business 本文选择mapinfo地理信息系统作为开发平台，结合microsoftaccess数据库工具和visualbasic编程语言，利用丰富的专家知识，经过集成二次开发，深入分析了几种典型城市道路交通信息在地理信息数据库中的处理技术，设计和实现了数据录入、数据维护、数据查询、分析处理、数据输出等功能，对道路交通信息的空间数据和属性数据进行了一一对应的处理。并进一步提出将公安交通管理全部业务按信息化系统的需要划分为：交通基础设施管理系统、公共交通管理系统、交通调查管理系统、交通秩序管理系统四个系统，每个系统下面分为若干子系统，从而细化了城市道路交通管理的业务。
