Winsockpragramming (2) Client (c + + version)

Creating a client is similar to creating a server process, but slightly different, as I do not describe in detail here.
Create a client process
1, initialize the socket font

Initialize the socket font code:

data;//定义WSAData变量WOED wVersionRequested=MAKEWORD(2,0);//定义套接字库版本号::WSAStartup(wVersionRequested,&data);//初始化套接字库

2. Create socket handle

To create a socket handle code:

SOCKET s;//定义套接字句柄s=::socket(AF_INET,SOCK_STREAM,0);//创建并返回套接字句柄

3. Address structure setting and byte order conversion

Address structure settings and byte order conversion code:

sockaddr_in addr;//定义套接字地址结构变量in_addr in_add;//定义IP地址结构变量addr.sin_fimily=AF_INET;//指定地址家族为TCP/IPaddr.sin_port=htons(80);//指定端口号addr.sin_addr.S_un.S_addr=inet_addr(‘127.0.0.1‘);//将字符串IP转换为网络字节顺序排列的IPchar address[]=inet_ntoa(addr.sin_addr.S_un.S_addr)//将网络字节顺序排列的IP转换为字符串IP

4. Send connection request

Send connection request code

::connect(s,(sockaddr*)&addr,sizeof(addr));

5. Data sending and receiving

Data sending and receiving code:

::send(s1,sztext,sizeof(sztext),0);::recv(s,sztext,sizeof(sztext),0);

6. Close socket

Close the socket code:

::closesocket(s);

7. Release Socket font

Release Socket font code:

::WSACleanup();

Full Source:

/*client.cpp*/#include <winsock2.h>//Include header files #include <stdio.h>#include <windows.h>#pragma comment (lib, "Ws2_32.lib")//Explicit connection socket font intMain () {//Initialize socket fontWsadata data;//define WSADATA Structure objectWORD W=makeword (2,0);//define version number:: WSAStartup (W,&data);//Initialize socket font    Charsztext[Ten]={0};//Create socket handleSOCKET s;//define connection sockets and data receiver socket handlesS=::socket (Af_inet,sock_stream,0);//Create a TCP socket    //Address structure settings and byte conversionSockaddr_in addr;//Define socket address structureAddr.sin_family=af_inet;//Initialize address structureAddr.sin_port=htons ( the);//Set port numberAddr.sin_addr. S_un. S_ADDR=INET_ADDR ("127.0.0.1");printf("Client has started \ r \ n");//Output prompt information    //Send connection request:: Connect (S, (sockaddr*) &addr,sizeof(addr));//Receive server data:: Recv (S,sztext,sizeof(Sztext),0);printf("%s\r\n", Sztext);//close socket handle:: Closesocket (s);//Release socket font:: WSACleanup ();if(GetChar ()) {return 0; }Else{:: Sleep ( -);//Apply hibernation for 0.1 seconds}}

Winsockpragramming (2) Client (c + + version)