Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!uwm.edu!gem.mps.ohio-state.edu!ginosko!cg-atla!fredex
From: fredex@cg-atla.UUCP (Fred Smith)
Newsgroups: comp.lang.c
Subject: Re: printf
Message-ID: <7799@cg-atla.UUCP>
Date: 22 Oct 89 01:18:13 GMT
References: <543@uwm.edu>
Reply-To: fredex@cg-atla.UUCP (Fred Smith)
Distribution: na
Organization: Agfa Compugraphic Division
Lines: 15

In article <543@uwm.edu> zhao@csd4.csd.uwm.edu (T.C. Zhao) writes:
>I recently came across a piece of c code:(both a and b are integers)
>printf("%d"+(a),b);
>in passes compiler without any problem, what does this code mean ?



"%d" evaluates to a POINTER to a char, i.e., char *. It is legal to
add an integer to a pointer, so if one assumes that (a) represents an
integer value, this would pass the value of the pointer, offset by the
value of the integer expression a, as the first parameter of the
printf call. God alone knows WHY anyone would want to do that, but,
yes, it does appear to be legal C.

Fred