how do I find the port number used after a return from accept()

[mathews20]

I'm trying to determine what port is being used on the server side after 
calling accept and it returning with a new file descriptor. 

the man page for accept() says:
DESCRIPTION
     The accept function is used with  connection-based  socket
     types  (SOCK_STREAM,  SOCK_SEQPACKET  and  SOCK_RDM).   It
     extracts the first connection  request  on  the  queue  of
     pending  connections,  creates a new connected socket with
     mostly the same properties as s, and allocates a new  file
     descriptor  for  the socket, which is returned.  The newly
     created socket is no longer in the listening  state.   The
     original  socket  s  is unaffected by this call. Note that
     any per file descriptor flags (everything that can be  set
     are not inherited across an accept. 

Ok, so I'm establishing a listen port, and as I understand it when a 
connection/data request comes in the accept returns with a "new connected 
socket".  So I would assume this new socket is using a different port other 
than the original that is being listened on.  I've tried calling [on the 
return descriptor from accept()] 

clientFD = accept(serverFD, NULL, NULL);
getsockname(clientFD, (struct sockaddr *)&tempt, (socklen_t *)&length_t);
cout << htons(tempt.sin_port) << endl; 

but tempt.sin_port keeps showing the original port that serverFD was 
established with rather than a different port.  I've always understood the 
port number was used by the network code to route incoming data to the 
proper file descriptor.  So wouldn't that mean there will be a different 
port used by the accept()s return file descriptor?  Or am I doing something 
wrong in trying to get the correct port number.