I was doing a small program to send multicast! ! ! ! ! ! ! ! ! ! ! ! !

文件传输，自已学习时写的小程序，功能简单，适合初学网络编程的朋友，喜欢的朋友请下。-FileTran

使用Winsock控制，进行UDP消息的发送和接收,VB源码-Use Winsock Control to conduct UDP send and receive messages, VB source

单射函数问题 设函数f将点集S = {0,1, , n -1}映射为f (S) = { f (i) | iÎ S} Í S 。单射函数问题要 从S中选取最大子集X Í S 使f (X )是单射函数。 例如，当n=7， f (S) = {1,0,0,2,2,3,6} Í S 时， X = {0,1,6} Í S 是所求的最大子集。-Injective function, the function f the problem will be the point set based S = (0,1,  , n-1) maps to f (S) = (f (i) | iÎ S) Í S. Injective function of the problem from the largest subset of S, select the X Í S so that f (X) is injective function. For example, when n = 7, f (S) = (1,0,0,2,2,3,6) Í S, when, X = (0,1,6) Í S is a subset of the desired maximum.

一个简单的SOCKET通信的例子。 可以作为服务端进行侦听，也可以作为客户端请求连接。-a simple example of Socket Communications. As for the interception server, the client can ask to be connected.

JAVA脚本源代码，一些很流行的代码，试用于初学者-Java script source code, some of the very popular code, use it on beginners

Ascii显示成Hex,在中文系统下也不会有任何问题.-convert ascii to Hex , and no problem in Chinese Environment.

Synchronous machine model- Synchronous machine model

纯ALOHA协议 在该协议下，用户只要有帧产生，就会传送出去，发生冲突时，就等待一个随机时间后再重发。 所以对当前帧时，只有两种情况下可以发送成功： 1）当前帧时只有一帧要发送，且当前帧时的前一帧时无帧发送； 2）当前帧时只有一帧要发送（发送时刻为t），且前一帧时的最后一帧的发送时间不在（t- FRAMETIME）~ t这段时间内。 其他情况下都会产生冲突。 发生冲突时，错误帧继续传送，用户重新发送帧，设定一个随机数Rt，将该帧添加到第Rt/ FRAMETIME帧时上去，并设该帧的相对时间为Rt% FRAMETIME。这样即相当于用户等待一随机时间后重发。 对每一帧时进行上述控制，最终可得到成功发送的次数Suc，将其除以Suc = Suc /ARRAYLENGTH即得平均每帧时发送成功的帧数。 对于不同G，得到不同FrameArray，所得的Suc也不同，用一个数组来保存G与Suc的对应关系，再将其画出来。 -pure ALOHA agreement under the agreement, as long as users have a frame, it will transmit out, conflict, will wait for a random period of time before re-issued. Therefore, the current frame, there are only two circumstances can this success : 1) the current frame only one to send, and the current frame before one-time frame sent; 2) the current frame only to send a (t this moment), but before a final of a transmission time not (t-FRAMETIME) ~ t this time. Other cases will have conflict. Conflict, to continue to disseminate the wrong frame, users re-sending fram

能够用于在局域网传输文件，采用多线程的方法，基于mfc的对话框类，比较实用-can be used in LAN file transfer, multi-threaded approach, based on the dialog box type mfc more practical

Windows网络编程第二版补充材料,包含原代码与书中没有的NetB方面的介绍，是清华大学出版的.NET丛书里的-Network Programming Windows version of the second supplementary materials, and include the original code book not NetB the presentation, is published by the Tsinghua University. The NET Series