普通IO模拟AD

用Flex自动生成的词法分析器源码，内附所有源文件和使用说明(Automatically generated by Flex lexical analyzer source, containing all the source files and use)

钟面上的时针和分针之间的夹角总是在 0 ～180之间 ( 包括 0 和180 ) 。举例来说，在十二点的时候两针之间的夹角为 0 ，而在六点的时候夹角为180 ，在三点的时候为90 。本题要解决的是计算 12:00 到 11:59 之间任意一个时间的夹角。(The angle between the hour and minute hands of the clock face is always between 0 to 180 (including 0 and 180). For example, twelve o' clock, when the angle between the two pin 0, in the six o' clock when the angle is 180, three points for 90. This question must be resolved are the angle of the calculation of 12:00 to 11:59 any one time.)

STM32F103RB USB模拟串口范例，参考官方版本，改写双缓冲+环型队列接收，改写环节队列发送。工程开发环境为COOCOX IDE。(STM32F103RB USB virtual serial port example, refer to the official version, rewritten double buffering+ ring queue receiver, rewritten ring queue to send. Development environment for COOCOX IDE.)

ZipArchive，新增创建以及解压加密zip 文件_ZipArchive，精选ios编程学习源码，很好的参考资料。(ZipArchive, the new creation and extract the zip file encryption _ZipArchive, select learning IOS programming source code, a good reference.)

改程序就代码可以找出从不同角度或区间的两幅遥感影像的同名点(Change the program code can find it from different angles of the same name point or interval of two remote sensing images)

基于VC环境下的直线裁剪算法Cohen-Sutherland算法和Liang-Barsky算法的实现(Based on the realization of linear cutting algorithm VC environment under the Cohen-Sutherland algorithm and Liang-Barsky algorithm)

实现两个单片机通过SPI同步串行接口通信，一个作为主机负责响应，另一个作为从机负责发送。(Achieve two synchronous serial interface microcontroller via SPI communication, one as the host responds to the other as the slave responsible for sending.)

说明：  删除PE文件，含EXE，OCX，DLL，CAB，SYS等里面的文件证书，便于重新注册证和修改EXE(Remove PE files, including EXE, OCX, DLL, CAB, SYS etc. files inside the certificate, to facilitate re-registration card and modify the EXE)

说明：  本程序使用切锥法和激波膨胀波法对0°攻角下典型弹丸（尖锥头部-圆柱段-船尾）的表面压力分布进行对比计算。(In this program, the surface pressure distribution of a typical projectile (with tip, cylinder and stern) at 0 degree of attack angle is compared using tangent-cone method and shock expansion method.)

说明：  主要是自己学习时做的习题，希望对你有帮助(Mainly to their own learning exercises to do, want to help you)