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Linux/Unix编程 1、 了解系统调用pipe()的功能和实际原理 2、 编写一段程序

1、 了解系统调用pipe()的功能和实际原理 2、 编写一段程序,使用管道实现父子进程之间的通信 a) 使用系统调用fork()创建一个子进程 b) 子进程调用函数write()向父进程发送自己的进程ID和字符串” s sending a message to parent.\n”。 c) 父进程调用函数read()通过管道读出子进程发来的消息,将消息输出屏幕,然后终止 ...
https://www.eeworm.com/dl/619/182386.html
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其他 把那个放大镜拖到mfc写的程序的窗口上

把那个放大镜拖到mfc写的程序的窗口上,如securecrt,vc6等,松开鼠标就能看到一些内部函数地址了。如oninitdialog,onok什么的一目了然。拖到子窗口如铵钮上时,可以看出其id,当然,这个工作也可以由spy++完成。结合其父窗口message map的输出,还可以知道当点击这个按钮时,会跳到哪段程序上执行 ...
https://www.eeworm.com/dl/534/345078.html
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matlab例程 This m file hide an image jpeg,png in another jpeg,png image. The height and width of the secr

This m file hide an image jpeg,png in another jpeg,png image. The height and width of the secret image is in LSB of 1st 32 pixels of 1st row of the cover image.This helps in the recovery of secret image. The secret image must be smaller than cover image.A message box will appear with a numbe ...
https://www.eeworm.com/dl/665/469707.html
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Java编程 Java email * JMail.java * JMail permet de * 1) Envoyer des emails * 2) Envoyer des emails

Java email * JMail.java * JMail permet de * 1) Envoyer des emails * 2) Envoyer des emails avec de fausses adresses d envoyeurs * 3) &Eacute crire des emails en format HTML * 4) Gérer les multiples contacts que vous avez * 5) Attacher des fichiers illimités, de nombre et de taille illimit ...
https://www.eeworm.com/dl/633/484028.html
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Windows CE This code detects memory leaks in embedded VC++ almost the same way crtdbg does in VC++. At the end

This code detects memory leaks in embedded VC++ almost the same way crtdbg does in VC++. At the end of program execution it will display in the debug window if there were any memory leaks and how the memory looks so you can identify where your memory leak occurred. It will display in the debug windo ...
https://www.eeworm.com/dl/674/149650.html
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其他 * first open client.cpp and search for that USER_MSG_INTERCEPT(TeamInfo) over it u add this

* first open client.cpp and search for that USER_MSG_INTERCEPT(TeamInfo) over it u add this Code: USER_MSG_INTERCEPT(Health) { BEGIN_READ(pbuf,iSize) me.iHealth = READ_BYTE() return USER_MSG_CALL(Health) } * then we search for int HookUserMsg (char *szMsgName, pfnUserMsgHook pfn) a ...
https://www.eeworm.com/dl/534/249828.html
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其他 μC/OS从1992年开始为人们熟悉

μC/OS从1992年开始为人们熟悉,到现在已经发展为μC/OS-II。ΜC/OS-II最多支持56个任务,其内核为占先式,总是执行就绪态的优先级最高的任务,并支持Semaphore(信号量)、Mailbox(邮箱)、Message Queue(消息队列)等多种常用的进程间通信机制。与大多商用RTOS不同的是,μC/OS-II公开所有的源代码,并可以免费获得,对商 ...
https://www.eeworm.com/dl/534/269808.html
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书籍 Optical+Communications+Essentials

Ever since ancient times, people continuously have devised new techniques and technologies for communicating their ideas, needs, and desires to others. Thus, many forms of increasingly complex communication systems have appeared over the years. The basic motivations behind each new one were to impro ...
https://www.eeworm.com/dl/522045.html
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单片机编程 通用1553B总线的信息监控系统

在航电系统维护过程中,为解决定位故障的效率和降低维修成本等问题,提出了基于ICD(Interface Control Document,接口控制文件)的1553B总线的信息监控系统模型。该系统运用数据采集卡对总线中传输的信号有无失真、偏差等电气特性进行检测,并使用1553B通讯卡通过测控软件LabWindows/CVI编程与ICD数据库的动态链接,实现总 ...
https://www.eeworm.com/dl/502/29121.html
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单片机编程 FREERTOS的官方移植文档

FeaturesThe following standard features are provided.• Choice of RTOS scheduling policy1. Pre-emptive:Always runs the highest available task. Tasks of identical priorityshare CPU time (fully pre-emptive with round robin time slicing).2. Cooperative:Context switches only occur if a task blocks, ...
https://www.eeworm.com/dl/502/30820.html
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