本程序设计的是一个小型商店每天记的流水帐管理程序，没有具体到销售的每一样商品，只是记载了每一笔的收入和支出情况。经过简单扩充就可以成为一个完整的商店销售管理系统...

通过研究Linux的线程机制和信号量实现读者写者(Reader-Writer)问题并发控制。 1)写-写互斥：不能有两个写者同时进行写操作； 2）读-写互斥：不能同时有一个线程在读，而另一个线程在写； 3）读-读允许：可以有一个或多个读者在读； 4）读者优先的附加限制：如果读者申请进行读操作时已有另一个读者正在进行读操作，则该读者可直接开始读操作； 5）写者优先的附加限制：如果一个读者申请进行读操作时已有另一个写者在等待访问共享资源，则该读者必须等到没有写者处于等待状态后才能开始读操作。 -By studying the Linux thread mechanism and semaphores realize readers who write (Reader-Writer) the issue of concurrency control. 1) to write- write mutex: Can not write at the same time there are two write operations 2) read- write mutex: Can not have a thread at the same time in reading and writing another thread 3) Reading- Reading of permit: can have one or more readers read 4) the priority of additional restrictions readers: If the readers apply for a read operation, there was another reader being read, the reader can be directly started reading operation 5) to write additional priority Restrictions: If an application for a reader reading write operation has been in waiting for another visit to a shared resource, the read

SQLite Quesry, Call, Browser, WebView and Segment Control Example for iPhone

高校计算机学院操作系统课程关于进程通信的程序范例-University College of the operating system of computer programs on the example of the process of communication procedures

关于windows主板操作系统的运行代码-windows on the motherboard operating systems code

CSV文件的获取解码方式，编辑CSV文件，生成可以用Excel打开的CSV文件-CSV file to obtain decoding method, editing CSV files can be generated to open the CSV file using Excel

Orange s：一个操作系统的实现（书附源码）chapter2.rar-Orange" s: an operating system implementation (source code attached to the book) chapter2.rar

进程同步 -- 写者优先-process synchronization-- priority

基于麦克风阵波束形成的谱相减方法在语音增强中的应用-Microphone array beamforming based on the spectral subtraction method speech enhancement application

一个类linux的dos下开发的操作系统.-a category of dos linux operating system under development.

这是一个基于时间片的操作系统  通过时间分割 将51单片机 独立出N个低频单片机 并行运行程序，该系统有一定的实用性，特别是要驱动TFT屏的时候，在刷屏的同时单片机任能做其他事情，如果不是用操作系统，像51这种低端的单片机是做不到同时的，所以这个代码非常有学习的价值