使用TCP+winsock写的一个简单客户端程序（转）

本代码用VS2008编写:

 

#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();
}