VC++6编译，UDP组播程序，分为发射端和接收端两个部分，这是发射端程序...

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计算校验和 校验和算法描述：为保证网络上传输的数据的可靠性，在许多协议中都设置了校验和项，例如：IPv4、ICMPv4、IGMPV4、ICMPv6、UDP和TCP 等等。计算这些校验和的算法称为网际校验和算法，简单来说就是：把被校验的数据１６位进行累加，然后取反码，若数据字节长度为奇数，则数据尾部补一个字节的０以凑成偶数。 由于从输入文件读入的数据不能直接满足计算校验和的条件，所以首先对从文件读入缓冲区的数据进行预处理，即读入缓冲区时忽略空格。由于累加是按16位进行的，所以每次从缓冲区中读出4个字符，并将字符转换成对应的16进制数字，如此依次累加，直至数据全部读完。 还有一种情况，即如果数据长度为奇数个字节，则需要判断，并补0累加。程序中利用的是缓冲区长度计数器i和当前读取到计数器j判断数据长度是否为奇数。即如果数据长度为偶数，则读完数据时当前读取到计数器j的值应与缓冲区长度i相等，而如果数据长度为奇数，则读完数据时，当前读取到计数器j>缓冲区长度i，此时需将缓冲区中剩余的两个字符读出，并补0，转换成相应16进制数以后参与累加。 当累加结束后，将累加和的16位以上数据位移下再进行一次累加，并对最后累加和取反即得所求校验和。 -calculated checksum checksum algorithm Description : To ensure the network transmission of data reliability, in many of the agreements are set up and calibration, for example : IPv4, ICMPv4, IGMPV4, ICMPv6. UDP and TCP so on. Calculating checksum algorithm called the Internet checksum algorithm, the simple answer is : as has been the calibration data for 16 cumulative, and then take the anti-code, if the data byte length of the odd, data will make up the tai

Visual C++.NET专业项目实例开发 Visual C++.NET专业项目实例开发-Visual C++. NET development of professional project examples of Visual C++. NET development of professional project examples

另一个跨平台的网络开发框架-another cross-platform network development framework

Simulates Different types of Network protocols

简易SOCKET编程。供有需要的人们使用，谢谢合作-Easy SOCKET programming. The needs of the people to use, thank cooperation

开发语言可以为C#,Delphi和VC，并支持面向对象的开发的支持，在服务容量增加的时候很方便的扩充，因此可以很方便的开发C/S网络应用。此外，充分利用UDP的优点并增加了通讯的可靠性。以及对用户的可管理性简化了用户的开发难度。-Development language for the C#, Delphi and VC, and to support the development of object-oriented support to increase capacity in the service when the expansion is convenient, it can be very convenient to develop C/S network application. In addition, full use of the advantages of UDP and increased communications reliability. As well as the users can simplify the management of the development of user difficulty.

vc的简单网络编程,windows下ping程序,功能强大-vc simple network programming under windows ping procedures, powerful

c++ builder socket 通讯-c++ builder socket communication

这是c++获取网上资源的例子，用来获取天气预报-This is c++ Access to online resources, examples, used to obtain weather forecasts