第4章：聚合函数

计算校验和 命令行：check_sum infile 其中check_sum是程序名，infile是数据文件名 输出：数据文件的校验和。 目的是通过数据链路层与介质访问控制层的学习，根据数据链路层的基本原理，针对普遍应用的Ethernet帧，通过构造一个具体的帧，深入理解网络协议的基本概念与网络问题处理的一般方法。-calculated checksum command line : check_sum infile which check_sum procedures, and infile data output file name : data files, the checksum. The purpose of the data link layer and the MAC layer of learning, according to the data link layer to the basic principles of universal application against the Ethernet frame, and by constructing a concrete frames, in-depth understanding of network protocols and the basic concepts of network issues to deal with the general approach.

Embarcadero Delphi is an integrated development environment (IDE) for console, desktop graphical, web, and mobile applications.[1] Delphi s compilers use their own Object Pascal dialect of Pascal and generate native code for several platforms: 32-bit and 64-bit Windows, 32-bit Mac OS X, iOS and Android. Delphi was originally developed by Borland as a rapid application development tool for Windows, and as the successor of Borland Pascal. Delphi and its C++ counterpart, C++Builder, shared many core components, notably the IDE and VCL, but remained separate until the release of RAD Studio 2007. RAD Studio is a shared host for Delphi, C++Builder, and others. In 2006, Borland’s developer tools section were transferr

Determine pixel color and RGB -Value under thr mouse cursor.

利用VC++和OpenGVS结合编的一个关于火车运行的三维模拟程序。是OpenGVS三维初学者的应该参考的好范例。(VC and OpenGVS combination of a series of trains running on the three-dimensional simulation program. OpenGVS 3D is the beginners can learn from the good examples.)

Sample Visual Studio C++ 6 source code for building a text file viewer named, TextView. May be used as a replacement for Microsoft s Notepad utility.

ASP.NET数据库链接SQL的一些例子,都是很好的我想一定会对您有用的。-ASP.NET SQL database link some examples are very good, I think you will definitely be useful.

利用JMAIL控件发送邮件的代码，做成邮件发送器，不需要每次发邮件都去打开邮箱的网页，支持发送附件-JMAIL control the use of the code to send mail, make e-mail, and do not need to have each email the page to open the mail in support of sending attachments

FileManipulate是一个基于对话框的MFC应用程序，实现了文件的删除、复制和移动等功能。(FileManipulate is a dialog-based MFC application that implements file to delete, copy and move functions.)

ASP源码,这个用记事本打开里边里边有三段源码,只用其中一段即可,每行有有明确的注释-ASP source code, the use Notepad to open inside has three sections inside source, only one paragraph to each line has specific notes have

说明：  五种飞行轨迹，轨迹中包含各种飞行姿态，适合初学者。(Five Kinds of Flight Trajectories)