例题13.1 一元二次方程及出错信息

为了了解系统的资源分配情况，假定系统的任何一种资源在任一时刻只能被一个进程使用。任何进程已经占用的资源只能由进程自己释放，而不能由其他进程抢占。当进程申请的资源不能满足时，必须等待。因此，只要资源分配算法能保证进程的资源请求，且不出现循环等待，则系统不会出现死锁。 要求编写系统进行资源调度的程序，采用银行家算法，有效地避免死锁的产生。(In order to understand the resource allocation of the system, it is assumed that any resource of the system can only be used by one process at any one time. Any resources that have been occupied by the process can only be released by the process itself, rather than by other processes. You must wait when the resources for the process cannot be satisfied. Therefore, as long as the resource allocation algorithm can guarantee the resource request of the process, and there is no circular waiting, the system will not deadlock. Write the system scheduling procedures for resources, using bankers algorithm, effectively avoid the deadlock.)

这是C++Primer的书籍的源代码，包括课后习题的答案，是份很不错的代码，尤其针对初学者(This is the source code of C++Primer books, including after-school exercises, answers, were very good code, especially for beginners)

VC调用java的简单例子。需要注意jvm.dll路径，路径不对就不能成功！(VC called a simple example. Attention jvm.dll path, the road would not be wrong!)

Exemple how to use a LCD display with a microcontroler Cygnal c8051fx20 / LCD bsz2006

用于求三组数，每组数的各个位都不相同。第二组数为第一组的2倍，第3组数为第一组的3倍(Is used to find the number of three, the number of the bits in each group are different. The second number of groups for the first group of two times the number of the third group of three times the first group)

说明：  vc++做的俄罗斯方块游戏，具有统计分数，级别 设置。(vc++ to do the Tetris game, with a statistical score, level setting.)

PLC/IHM西门子破解密码方案（LOGO！），SIMATIC＝S7-200／300/400，Tia门户S7-1200／1500，WinCC C-Script，WinCC VB脚本）。PROFACE（GP Pro-Project PANEL）Delta（WPLSOFT项目（EPAS-4项目））。Schneider（ToudoSub项目）。(Program for Crack Password Project of PLC/IHM Siemens(LOGO! , Simatic= S7-200/300/400, Tia Portal S7-1200/1500 , Wincc C-Script, Wincc VB-Script). Pro-face(GP-Pro EX Project Painel).Delta (WPLSoft Project (EPAS-4 Project). Schneider (Twido Suite Project).)

非常经典的C++程序，十分实用对于练习程序来说。(good programme)

用代码实现一个木质的相框效果， 后续可以在框里面添加其他的照相等功能(Using code to achieve the effect of a wooden photo frame, you can add other photography functions in the box later.)

ＰＬＣ通信测试，，做参考用，较用串口助手时方便一点(PLC communication test, for reference purposes, more convenient than using serial assistant.)