g a w k或GNU awk是由Alfred V. A h o,Peter J.We i n b e rg e r和Brian W. K e r n i g h a n于1 9 7 7年为U N I X创建的a w k编程语言的较新版本之一。a w k出自创建者姓的首字母。a w k语言(在其所有的版本中)是一种具有很强能力的模式匹配和过程语言。a w k获取一个文件(或多个文件)来查找匹配特定模式的记录。当查到匹配后,即执行所指定的动作。作为一个程序员,你不必操心通过文件打开、循环读每个记录,控制文件的结束,或执行完后关闭文件。
上传时间: 2014-01-02
上传用户:hwl453472107
使用unix的api实现unix下的rm函数,可支持-r -i -u选项
上传时间: 2014-01-20
上传用户:dongqiangqiang
详细实现rm的功能,包括-i,-r,--i等功能。
标签:
上传时间: 2017-07-27
上传用户:sevenbestfei
Code Warrior 4.7 Target : MC9S12XS128 Crystal: 16.000Mhz busclock:16.000MHz pllclock:32.000MHz ============================================ 演示程序使用说明: 1.串口9600bps,中断显示 2.PWM波形测试,测试方法: 按u:增加频率 按d:降低频率 按l:减小占空比 按r:增加占空比 按o:开启声音 按c:关闭声音
标签: 16.000 MHz busclock pllclock
上传时间: 2017-07-28
上传用户:com1com2
Analysis and Simulation of UHF RFID System Jin Li, Cheng Tao Modern Telecommunication Institute, Beijing Jiaotong University, Beijing 100044, P. R. China Abstract This article presents the analysis and simulation of UHF RFID system
标签: Telecommunication Simulation Institute Analysis
上传时间: 2013-12-21
上传用户:从此走出阴霾
RS_latch using vhdl, When using static gates as building blocks, the most fundamental latch is the simple SR latch, where S and R stand for set and reset. It can be constructed from a pair of cross-coupled NOR (Not OR) logic gates. The stored bit is present on the output marked Q. Normally, in storage mode, the S and R inputs are both low, and feedback maintains the Q and Q outputs in a constant state, with Q the complement of Q. If S (Set) is pulsed high while R is held low, then the Q output is forced high, and stays high when S returns to low similarly, if R (Reset) is pulsed high while S is held low, then the Q output is forced low, and stays low when R returns to low.
标签: using fundamental the RS_latch
上传时间: 2017-07-30
上传用户:努力努力再努力
Functions are mappings from one Manifold to anotheR. Discrete Functions are functions which can be represented using a finite number of values. Given the finite extent of computer memory, algorithms which compute a function that satisfies some special properties are computing a discrete function which approximates a continuous function. Computing the function involves writing a set of equations that may be solved for the values representing the function.
标签: Functions are functions Discrete
上传时间: 2017-08-05
上传用户:671145514
针对火车站的订票实际情况,按照软件工程的结构化设计思想,本次课程设计经过项目的可行性研究和需求分析、总体设计、详细设计,以及编码实现和调试等步骤设计开发了火车站网上订票系统。并运用数据流图和数据字典、E-R图和数据库逻辑结构、层次图、系统流程图、以及程序流程图,对该系统的数据需求、数据库、系统软件结构、系统流程、以及处理过程等进行了分析和设计。 本次课程设计利用JSP 开发工具和SQL Server 2000数据库来开发这个火车站网上订票系统。该系统要解决的是火车站网上订票工作所要解决的问题,可以满足火车站网上订票的基本要求,包括查询、订票、退票等三个方面的功能。该系统能运用到火车站订票的工作中,根据用户的需求,设置其权限,并快捷方便的为用户提供服务。
标签: 火车
上传时间: 2017-08-06
上传用户:来茴
To write data to the FIFO, present the data to be written and assert the write enable. At the next rising edge of the clock, the data will be written. For every rising edge of the clock that the write enable is asserted, a piece of data is written into the FIFO. If the FIFO has data in it, the value at the head of the FIFO is present on the FIFO data output. To read data from the FIFO, assert the read enable. At the next rising edge of the clock, capture the data output the FIFO will subsequently advance to the next piece of data stored in the FIFO.
上传时间: 2014-08-16
上传用户:wab1981
路由信息协议,防止路由选择环路的机制,简单R I P配置,配置单播R I P更新
上传时间: 2014-12-08
上传用户:jackgao