Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sun-barr!ames!haven!adm!smoke!gwyn
From: gwyn@smoke.brl.mil (Doug Gwyn)
Newsgroups: comp.lang.c
Subject: Re: Func Protos with K&R Func Defs
Message-ID: <15354@smoke.brl.mil>
Date: 28 Feb 91 16:32:41 GMT
References: <11614@jpl-devvax.JPL.NASA.GOV> <1991Feb28.021715.18153@athena.mit.edu>
Organization: U.S. Army Ballistic Research Laboratory, APG, MD.
Lines: 11

In article <1991Feb28.021715.18153@athena.mit.edu> jik@athena.mit.edu (Jonathan I. Kamens) writes:
>  In ANSI C, a function declaration must match its definition.  That means
>that if the declaration is prototyped, then the definition must also be
>prototyped, with the same types; if the declaration is not prototyped, then
>the definition cannot be prototyped either.

This is not true.  The types must be compatible, but subject to that
constraint the use of "old-style definitions" is compatible with the
use of prototypes.  (Basically, this means that the declared
parameter types must be those resulting from default argument
promotion, i.e. "widened" types.)