Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!usc!brutus.cs.uiuc.edu!wuarchive!emory!hubcap!grimlok
From: grimlok@hubcap.clemson.edu (Mike Percy)
Newsgroups: comp.lang.c
Subject: Macro help
Message-ID: <8284@hubcap.clemson.edu>
Date: 8 Mar 90 20:10:39 GMT
Organization: Clemson University, Clemson, SC
Lines: 16

Awhile back I saw some code which used a macro that had a do...while(0)
loop in it.  At the time I thought, hey that's a good idea, but now that I need
to do something while could use this I'm stuck.   
 
Here's my situation: 
I am reading chars. When I hit '\n' I need to skip the first 6 chars on
the next line ( anyone guess why?) and return the next char.  Effectively this
removing all "\nxxxxxx" from the stream.

I tried this:
  
#define input(ch) \ 
   ((ch) = getchar) != '\n' ? (ch) : \
   (do { int i = 5; while(i--) (void) getchar(); } while(0);), getchar()
 
But this doesn't seem to work.  Anyone that can help me out there?