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Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!mailrus!uwmcsd1!marque!uunet!mcvax!hp4nl!nikhefk!tomp
From: tomp@nikhefk.UUCP (Tom Ploegmakers)
Newsgroups: comp.unix.wizards,comp.lang.c
Subject: Re: Problem with printf()
Message-ID: <429@nikhefk.UUCP>
Date: 6 Oct 88 12:30:13 GMT
References: <504@imec.UUCP>
Reply-To: tomp@nikhefk.UUCP (Tom Ploegmakers)
Organization: Nikhef-K, Amsterdam (the Netherlands).
Lines: 34

In article <504@imec.UUCP> croes@imec.UUCP (Kris Croes) writes:
>  main()
>  {
>  int i = 17;
>  float f = 17.0;
>
>  printf("%d %f\n",i,i); /*1*/
>  printf("%d %f\n",f,f); /*2*/
>  }
>
>Its output is:
>17 0.000000
>17032 0.000000
>      ^^^^^^^^ Shouldn't this be 17.00000 ?
>

This one has bitten me once too.
The problem is that floats are not passed to functions on the stack, but by
passing a pointer. That is, sometimes, you should check your compiler.

To make it work use:
  printf("%d %f\n",i,(float)i); /*1*/
  printf("%d %f\n",(int)f,f); /*2*/

Suc6.

tom ploegmakers		NIKHEF/K-CSG	(tomp@nikhefk.uucp)	

			po.box 4395, 1009 AJ Amsterdam, the Netherlands.
-- 

tom ploegmakers		NIKHEF/K-CSG	(tomp@nikhefk.uucp)	

			po.box 4395, 1009 AJ Amsterdam, the Netherlands.