Simple Network Programming Application (Update Time)

# Include <iostream>
# Include <stdio. h>
# Include <windows. h>
# Include <string. h>

Using namespace STD;

# Pragma comment (Lib, "ws2_32.lib ")

Class cinitsock
{
Public:
Cinitsock (INT version01 = 2, int versiont02 = 2)
{
Word sockversion = makeword (2, 2 );
Wsadata = {0 };

If (wsastartup (sockversion, & wsadata )! = 0)
{
Cout <"initlization failed! "<Endl;

Exit (0 );
}

}

~ Cinitsock ()
{
Wsacleanup ();
}
};

Cinitsock mysock;

Void settimefromtp (ulong ultime)
{
Filetime ft;
Systemtime st;

St. wyear = 1900;
St. wmonth = 1;
St. wday = 1;
St. whour = 0;
St. wminute = 0;
St. wsecond = 0;
St. wmilliseconds = 0;

Systemtimetofiletime (& St, & ft );

Longlong * pllong = (Longlong *) & ft;

* Pllong + = (Longlong) 10000000 & ultime;

Filetimetosystemtime (& ft, & St );

Setsystemtime (& St );
}

Int main ()
{
Socket S = socket (af_inet, sock_stream, ipproto_tcp );

If (S = invalid_socket)
{
Cout <"faied socket" <Endl;

Return 0;
}

Sockaddr_in sin;

Sin. sin_addr.s_un.s_addr = inet_addr ("129.6.15.28 ");
Sin. sin_family = af_inet;
Sin. sin_port = htons (37 );

If (connect (S, (sockaddr *) & sin, sizeof (SIN) =-1)
{
Cout <"failed connect..." <Endl;
Return 0;
}

Ulong ultime = 0;

Int nrecv = Recv (S, (char *) & ultime, sizeof (ultime), 0 );

If (nrecv> 0)
{
Ultime = ntohl (ultime );
Settimefromtp (ultime );

Cout <"Update time successfully! "<Endl;
}
Else
{
Cout <"can't update time..." <Endl;
}

Closesocket (s );

Return 0;
}