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Java程序设计语言开发的电子白板，功能简单，仅供学习参考之用。

Client程序同样分别创建一个TCP socket 和一个UDP socket，首先client使用TCP socket连接TCP Server。 连接成功后显示提示信息； 然后client端向TCP Server发送“GET UDP PORT”字符串，Server收到后向client回送自己的UDP Server 端口号（即Client端仅知道TCP Server的端口号而不知道UDP Server的端口号）； client在收到UDP Server的端口号后, 为用户显示3个选项： 1．“Get current time（TCP）”服务器时间 2．“Echo Mode（UDP）”回显6 3．“Exit the program”. -Client program also creates a TCP socket, respectively, and a UDP socket, the first client to use TCP socket connection TCP Server. After a successful connection displays a prompt message and then client-side to the TCP Server sends " GET UDP PORT" string, Server receipt back to the client to send their UDP Server port number (ie, Client-side only to know the TCP Server" s UDP port number do not know Server" s port number) client received UDP Server port number, in order to the user three options: 1. " Get current time (TCP)" server time 2. " Echo Mode (UDP)" echo 63. " Exit the program" .

自己写的一个OPC UA客户端，可用于连接西门子机床，实现读写、订阅的功能。(I write a OPC UA client, which can be used to connect SIEMENS machine tools to realize the function of read, write and subscribe.)

【实例简介】

一个select模型的聊天客户程序-a select model Chat client

说明：  本Demo演示了NI公司LabVIEW图形化开发环境的并行编程模式。在并行循环之间可以通过队列或者是局部变量传递数据。(This Demo demonstrates the parallel programming model of NI's LabVIEW graphical development environment. Between parallel loops, data can be passed through queues or local variables.)

bo3-1.cpp 顺序栈（存储结构由c3-1.h定义）的基本操作（9个） algo3-6.cpp 表达式求值（输入、输出和中间结果均只能是0～9）(Bo3-1.cpp order of the stack (storage structure defined by the c3-1.h) basic operations (9) Algo3-6.cpp expression evaluation (input, output, and intermediate results are only 0 to 9))

说明：  实现Qt程序对excel表格数据的快速读写，适用于数百条以上的数据记录。(Realize Qt program fast reading and writing of excel table data, suitable for more than hundreds of data records.)

实现车速引导的小程序，计算车速并提示驾驶员建议的引导车速已实现辅助驾驶的目的(A Small Program to Realize Speed Guidance)

利用VB.net编写的发送电子邮件代码-use VB.net prepared by the e-mail code