Questions about using udp to transmit data in Windows and linux!

Questions about using udp to transmit data in Windows and linux! -- Linux general technology-Linux technology and application information. For details, refer to the following section. I am running a udp client program in linux and then sending data. Could you tell me something wrong with the function? Please advise. If I try to use the udp test tool in windows, I cannot receive it, thank you!
# Include
# Include
# Include
# Include
# Include
# Include
# Include

# Define PORT 2000/* listener PORT */
# Define MAXDATASIZE 100/* buffer size */

Int main (int argc, char * argv [])
{
Int fd, numbytes;
/* Store received messages */
Char buf [MAXDATASIZE];
/* Store remote server information */
Struct hostent * he;
/* Server address information */
Struct sockaddr_in server, reply;

If (argc! = 3)
{/* Usage */
Printf ("Usage: % s \ N ", argv [0]);
Exit (1 );
}

If (he = gethostbyname (argv [1]) = NULL)
{
Printf ("gethostbyname () error \ n ");
Exit (1 );
}

If (fd = socket (AF_INET, SOCK_DGRAM, 0) =-1)
{
Printf ("socket () error \ n ");
Exit (1 );
}

Bzero (& server, sizeof (server ));
Server. sin_family = AF_INET;
Server. sin_port = htons (PORT );
Server. sin_addr = * (struct in_addr *) he-> h_addr );
/* Send a message to the server */
Sendto (fd, argv [2], strlen (argv [2]), 0 ,\
(Struct sockaddr *) & server, sizeof (struct sockaddr ));
While (1)
{
Int len;
/* Receive messages from the server */
If (numbytes = recvfrom (fd, buf, MAXDATASIZE, 0 ,\
(Struct sockaddr *) & reply, & len) =-1)
{
Printf ("recvfrom () error \ n ");
Exit (1 );
}

If (len! = Sizeof (struct sockaddr) | \
Memcmp (const void *) & server, (const void *) & reply, len )! = 0)
{
Printf ("Receive message from other server. \ n ");
Buf [numbytes] = '\ 0 ';
Printf ("Server Message: % s \ n", buf );
Break;
}
}
/* Close the socket */
Close (fd );
Return 0;
}