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Path: utzoo!watmath!watnot!watmum!rmariani
From: rmariani@watmum.UUCP
Newsgroups: comp.sys.amiga
Subject: Re: C-compilers for Amiga are Terrible (really Manx problem)
Message-ID: <703@watmum.UUCP>
Date: Mon, 1-Dec-86 00:15:44 EST
Article-I.D.: watmum.703
Posted: Mon Dec  1 00:15:44 1986
Date-Received: Mon, 1-Dec-86 02:29:43 EST
Reply-To: john13@garfield.UUCP (John Russell)
Distribution: net
Organization: U of Waterloo, Ontario
Lines: 31
Keywords: %f printf floating point
Summary: link with the math libraries

In article <3061@garfield.UUCP> john13@garfield.UUCP (John Russell) writes:
>
>main()
>{ float x=1;
>  printf("%f\n",x); }
>
>should work, right? Wrong! I tried this too and again it just printed the
>letter f. So please, no flood of replies saying "force it to float with a
>decimal point!".
>
>John


Once you know all the details, this isn't really a problem, it's a feature.

In the runtime libraries, a large amount of the code to do a printf is
associated with printing formatted floating point numbers, however, this
code is not always used (I hardly ever use floating point in my C programs
for instance).  Thus there are two versions of printf, one which doesn't
have the floating point code in it (that's the one in c.lib and c32.lib)
and one with the floating point code (m.lib and m32.lib (have I got those
names right?  Well the math libraries... whatever they're called).  To get
the version with the floating point in it, simply link with m.lib.  Make sure
that it is first in the list of libraries (or before c.lib anyway) otherwise
you'll get the no %f version that's in the other library.


Like I said this is a feature (It's documented!  Read the manual!  All of it! )
It makes many programs quite a bit smaller...

	-Rico