parsing incoming data

[sunburnt]

Hullo. I'm writing a simple server which will parse messages and respond to them. Since I do not usually work with c++, I'm looking for a little help
My protocol is a simple one -- Command\rArgument\rArgument\n (or Command\n) but I'm having trouble parsing it. What I would like to do is set up a buffer which data is put into, and then complete commands are taken out/parsed and any leftover is returned to the buffer. Unfortunantly, I'm not too clear on how to do this :P
Here's what we're looking at:

char input[256];
memset(input,0x20, 255);
input[255] = '\0';

while( sckout != SOCKET_ERROR )
{
	lenx = recv( sckout, input, sizeof(input), 0) ;
		if (lenx > 0)
		{
		/* ehhhhh :-D */
		}
						
	}
}

any comments/code would be appreciated. Thanks.