//Server端
#include   <Winsock2.h>
#include   <stdio.h>

void   main()
{
WORD   wVersionRequested;
WSADATA   wsaData;
int   err;

wVersionRequested   =   MAKEWORD(   1,   1   );

err   =   WSAStartup(   wVersionRequested,   &wsaData   );
if   (   err   !=   0   )   {
return;
}


if   (   LOBYTE(   wsaData.wVersion   )   !=   1   ||
                HIBYTE(   wsaData.wVersion   )   !=   1   )   {
WSACleanup(   );
return;  
}
SOCKET   sockSrv=socket(AF_INET,SOCK_STREAM,0);

SOCKADDR_IN   addrSrv;
addrSrv.sin_addr.S_un.S_addr=htonl(INADDR_ANY);
addrSrv.sin_family=AF_INET;
addrSrv.sin_port=htons(6000);

bind(sockSrv,(SOCKADDR*)&addrSrv,sizeof(SOCKADDR));

listen(sockSrv,5);

SOCKADDR_IN   addrClient;
int   len=sizeof(SOCKADDR);

while(1)
{
SOCKET   sockConn=accept(sockSrv,(SOCKADDR*)&addrClient,&len);
char   sendBuf[100];
sprintf(sendBuf, "Welcome   %s   to   http://www.sunxin.org ",
inet_ntoa(addrClient.sin_addr));
send(sockConn,sendBuf,strlen(sendBuf)+1,0);
char   recvBuf[100];
recv(sockConn,recvBuf,100,0);
printf( "%s
 ",recvBuf);
closesocket(sockConn);
}
}


//Client端
#include   <Winsock2.h>
#include   <stdio.h>

void   main()
{
WORD   wVersionRequested;
WSADATA   wsaData;
int   err;

wVersionRequested   =   MAKEWORD(   1,   1   );

err   =   WSAStartup(   wVersionRequested,   &wsaData   );
if   (   err   !=   0   )   {
return;
}


if   (   LOBYTE(   wsaData.wVersion   )   !=   1   ||
                HIBYTE(   wsaData.wVersion   )   !=   1   )   {
WSACleanup(   );
return;  
}
SOCKET   sockClient=socket(AF_INET,SOCK_STREAM,0);

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));

char   recvBuf[100];
recv(sockClient,recvBuf,100,0);
printf( "%s
 ",recvBuf);
send(sockClient, "This   is   lisi ",strlen( "This   is   lisi ")+1,0);

closesocket(sockClient);
WSACleanup();
}
 

http://blog.const.net.cn/a/11552.htm