Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!bbn!ulowell!masscomp!ftw
From: ftw@masscomp.UUCP (Farrell Woods)
Newsgroups: comp.lang.c
Subject: Re: Problem returning doubles from a function
Message-ID: <1337@masscomp.UUCP>
Date: 26 Mar 89 18:40:28 GMT
References: <39722@csvax1.cs.tcd.ie>
Reply-To: ftw@quasar.masscomp.UUCP (Farrell Woods)
Organization: Concurrent Computer Corporation - Westford, Ma
Lines: 19

In article <39722@csvax1.cs.tcd.ie> omahony@csvax1.cs.tcd.ie (Donal O'Mahony - OMAHONY@cs.tcd.ie) writes:
>Can anone explain the problem with the following program (made up of
>2 files).

[example deleted]

You get garbage for output, right?  In main.c, you have no prototype in scope
for the function ``store_length'' in rt1.c.  The compiler defaults to casting
the argument to store_length to an int, where you would have preferred it
to pass a double.

The solutions are: explicitly cast the argument to double, or (better still)
create a prototype in main.c for the function store_length.

-- 
Farrell T. Woods				Voice:  (508) 392-2471
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