程序代码：

#include <stdio.h>
#include "winsock2.h"
//#pragma comment(lib, "ws2_32.lib") //2.0版本
int main() {
    // Initialize Winsock.
    WSADATA wsaData;
    int iResult = WSAStartup( MAKEWORD(2,2), &wsaData );
    if ( iResult != NO_ERROR ){
        printf("Error at WSAStartup()\n");
    }
   

    // Create a socket.
    SOCKET m_socket;
    m_socket = socket( AF_INET, SOCK_STREAM, IPPROTO_TCP );
    if ( m_socket == INVALID_SOCKET ) {
        printf( "Error at socket(): %ld\n", WSAGetLastError() );
        WSACleanup();
        return 1;
    }
    // Connect to a server.
    struct sockaddr_in clientService;
    clientService.sin_family = AF_INET;
    clientService.sin_addr.s_addr = inet_addr("113.106.90.157");
    clientService.sin_port = htons( 80 );
    if ( connect( m_socket, (SOCKADDR*) &clientService, sizeof(SOCKADDR)) == SOCKET_ERROR){
        printf( "Failed to connect.\n" );
        WSACleanup();
        return;
    }

    // Send and receive data.
    int bytesSent;
   

    char sendbuf[1024];
    sprintf(sendbuf,"%s","GET / HTTP/1.1\r\n");
    strcat(sendbuf,"Host: www.\r\n");
    strcat(sendbuf,"Content-Encoding: utf-8\r\n");
    strcat(sendbuf,"User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:25.0) Gecko/20100101 Firefox/25.0\r\n\r\n");
   

    int bytesRecv = strlen(sendbuf);
    char recvbuf[1024];
    char *precvbuf = recvbuf;
    bytesSent = send( m_socket, sendbuf, strlen(sendbuf), 0 );
    printf( "Bytes Sent: %ld\n", bytesSent );   

   

//    bytesRecv = recv( m_socket, recvbuf, 2 , 0 );
//    printf("\n %d\n",bytesRecv);
   

   

    while( 1 ) {
        bytesRecv = recv(m_socket, recvbuf,1024 , 0);
        printf("%s",recvbuf);
    

       // printf("\n%d\n",bytesRecv);
        if(bytesRecv<=0){
            break;
        }    

      

    }   


    



    close(m_socket);
    return 0;
} 



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