TCP服务器端和客户端程序

实现 tcp的端口映射 不同于udp的实现方法(Realization of TCP port mapping from UDP realization method)

将socket封装进DLL，提供上层应用，简单方便(Into the socket package DLL, the upper application is simple and convenient)

运动的球,一个api小程序,适合初学者学习,()

private void Connect_Click(object sender, System.EventArgs e)        {            //将光标置为等待状态            Cursor cr = Cursor.Current;            Cursor.Current = Cursors.WaitCursor;            String a ,b,c;              //用110端口新建POP3服务器连接            Server = new TcpClient(PopServer.Text, 110);            Status.Items.Clear();             try            {                //初始化                NetStrm = Server.GetStream();                RdStrm = new StreamReader(Server.GetStream());                Status.Items.Add(RdStrm.ReadLine());                 //登录服务器过程                Data = "USER " Username.Text CRLF;                szData = System.Text.Encoding.ASCII.GetBytes(Data.ToCharArray());                NetStrm.Write(szData, 0, szData.Length);                Status.Items.Add(RdStrm.ReadLine());                 Data = "PASS " Password.Text CRLF;                szData = System.Text.Encoding.ASCII.GetBytes(Data.ToCharArray());                NetStrm.Write(szData, 0, szData.Length);                Status.Items.Add(RdStrm.ReadLine());                 //向服务器发送STAT命令，从而取得邮箱的相关信息：邮件数量和大小                Data = "STAT" CRLF;                szData = System.Text.Encoding.ASCII.GetBytes(Data.ToCharArray());                NetStrm.Write(szData, 0, szData.Length);                //Status.Items.Add(RdStrm.ReadLine());                 //改变按钮的状态                Connect.Enabled = false;                Disconnect.Enabled = true;                Retrieve.Enabled = true;                 //将光标置回原来状态                Cursor.Current = cr;             }            catch (InvalidOperationException err)            {                Status.Items.Add("Error: " err.ToString());            }        }

PEMFC的simulink使用模型 包含电堆模型 氢气氧气供应系统模型，热传输模型，可进行仿真，参数可自行设置。(The simulink model of the PEMFC includes a model of a hydrogen reactor, an oxygen supply system model, and a heat transfer model that can be simulated and the parameters can be set.)

企业QQ系统，通过服务端，可让多个客户端进行文字和图像的通信。(QQ enterprise system, through the server, allowing multiple clients for text and image communications.)

TCP和UDP socket编程，向固定服务器发送学号姓名信息，用udp从服务器获得一个随机字符串(TCP and UDP socket programming, Student ID Name information sent to the fixed server udp from server to obtain a random string)

一个UDP穿透NAT的例子，遵守RFC3489(a UDP penetrate NAT example, compliance with RFC3489)

简单TCP双向通讯例子，实现客户端服务器端的双向通讯。(Simple the TCP bidirectional communication example, to achieve the client server-side two-way communication.)

计算机网络 多播 用C++编写 绝对可以用。。。。(计算机网络多播)