winsocket实现多线程连接

#include "stdafx.h"
#include<iostream>
#include<string>
#include<WinSock2.h>
#include<MSWSock.h>
using namespace std;
#pragma comment(lib,"ws2_32.lib")
#pragma comment(lib,"mswsock.lib")
int _tmain(int argc, _TCHAR* argv[])
{
WORD my;
WSADATA wsadata;
my=MAKEWORD(1,1);
int err;
err=WSAStartup(my,&wsadata);
SOCKET sc = WSASocket( AF_INET,SOCK_STREAM,0,NULL,0,NULL );
SOCKADDR_IN addr;
int  len;
addr.sin_family=AF_INET;
addr.sin_addr.s_addr=inet_addr("192.168.1.81");
addr.sin_port=htons(2000);
len=sizeof(addr);
connect(sc,(struct sockaddr *)&addr,len);
char buff[1024];
gets(buff);//从终端输入要发送给服务器端的数据
while(strcmp(buff,"0")!=0){
send(sc,buff,strlen(buff),0);
SecureZeroMemory(buff, 1024);
recv(sc,buff,1024,0);
cout<<buff<<endl;