套接字的編程步驟
在使用之前須鏈接庫(kù)函數(shù)：工程->設(shè)置->Link->輸入ws2_32.lib，OK！
SOCKET sockSrv=socket(AF_INET,SOCK_STREAM,0);//創(chuàng)建套接字（socket）。
SOCKADDR_IN addrSrv;
addrSrv.sin_addr.S_un.S_addr=htonl(INADDR_ANY);//轉(zhuǎn)換Unsigned short為網(wǎng)絡(luò)字節(jié)序的格式
addrSrv.sin_family=AF_INET;
addrSrv.sin_port=htons(6000);
客戶端代碼如下：
#include <Winsock2.h>
#include <stdio.h>
void main()
{
WORD wVersionRequested;
WSADATA wsaData;
int err;
wVersionRequested = MAKEWORD( 1, 1 );
err = WSAStartup( wVersionRequested, &wsaData );加載套接字庫(kù)
if ( err != 0 ) {
return;
}
if ( LOBYTE( wsaData.wVersion ) != 1 ||
HIBYTE( wsaData.wVersion ) != 1 ) {
WSACleanup()( );
return;
}
SOCKET sockClient=socket(AF_INET,SOCK_STREAM,0);創(chuàng)建套接字（socket）。
SOCKADDR_IN addrSrv;
addrSrv.sin_addr.S_un.S_addr=inet_addr("127.0.0.1");
addrSrv.sin_family=AF_INET;
addrSrv.sin_port=htons(6000);
connect(sockClient,(SOCKADDR*)&addrSrv,sizeof(SOCKADDR));向服務(wù)器發(fā)出連接請(qǐng)求（connect）。
char recvBuf[100];和服務(wù)器端進(jìn)行通信（send/recv）。
recv(sockClient,recvBuf,100,0);
printf("%s\n",recvBuf);
send(sockClient,"This is lisi",strlen("This is lisi")+1,0);
closesocket(sockClient);關(guān)閉套接字。
WSACleanup()();//必須調(diào)用這個(gè)函數(shù)清除參數(shù)
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