使用TCP+winsock写的一个简单客户端程序

]#include <winsock2.h>
#include <stdio.h>
#pragma comment(lib,"ws2_32.lib")
void main()
{
WSADATA          wsaData;
SOCKET           s;
SOCKADDR_IN      ServerAddr;
int Port = 8060;
int Ret;
//初始化winsock 2.2版本
if((Ret = WSAStartup(MAKEWORD(2,2),&wsaData)) !=0)
{
printf("Error:WSAStartup failed with %d/n",Ret);
}
//创建一个新的套接字来建立客户机连接
if((s = socket(AF_INET,SOCK_STREAM,IPPROTO_TCP)) == INVALID_SOCKET)
{
printf("ERROR:socket failed with %d/n",WSAGetLastError());
WSACleanup();
return;
}
//建立一个SOCKADDR_IN结构，用来连接到8060端口的监听服务器
ServerAddr.sin_family = AF_INET;
ServerAddr.sin_port = htons(Port);
ServerAddr.sin_addr.s_addr = inet_addr("127.0.0.1");
//用套接字s创建一个到服务器的连接
if(SOCKET_ERROR == connect(s,(SOCKADDR *)&ServerAddr,sizeof(ServerAddr)))
{
printf("connect failed with %d/n",WSAGetLastError());
closesocket(s);
WSACleanup();
return;
}
printf("connect succeed!/n");
//发送数据
if(SOCKET_ERROR == send(s,"hello",5,0))
{
printf("send failed with %d/n",WSAGetLastError());
closesocket(s);
WSACleanup();
return;
}
printf("send succeed!/n");
//关闭套接字
closesocket(s);
//应用程序完成对连接的处理后，调用WSACleanup
WSACleanup();
}