#include "CSocket.h"#include <fstream>int main(){	string word;	string filename;	string hostname;	int pos1 = 0;	int pos2 = 0;	cout << "enter the host name" << endl;	cin >> word;	//bulid the query for http	string quest = "GET ";	quest += word;	quest += " HTTP/1.0\r\n";	quest += "User-agent:Mozilla/4.0\r\n";	quest += "Accept-language:zh-cn\r\n\r\n";	//get the hostname and filename from the word	string str_http = "http://";	pos1 = word.find_first_of (str_http, 0);	pos2 = word.find_first_of ("/", pos1+7);	hostname = word.substr( pos1+7, pos2-pos1-7 );	pos1 = word.find_last_of( "/", word.size() );	filename = word.substr( pos1+1, word.size()-pos1-1 );	cout << "filename: " << filename << endl;	cout << "hostname: " << hostname << endl;	//use the hostname and port 80 to connect 	Sock_instance s_client( hostname, 80, CLIENT_TYPE );	if( !s_client.Connect() )	{		cout << "connect error" << endl;		return -1;	}	//send the http query to the host	cout << "connect is ok!" << endl;	if( !s_client.Send(quest) )	{		cout << "send is error!" << endl;		return -1;	}	//recieve all the file from the hsot	while( s_client.Receive() > 0 )	{	}	//write the binary data which is recieved on the file	FILE *fp = fopen( filename.c_str(), "wb" );	fwrite( s_client.data(), sizeof( unsigned char ), s_client.datalen(), fp );	fclose( fp );	return 0;}