Groups > comp.lang.c > #19284

Computed values don't tie up

From	rkfb <rkfb@rebelCode.slacknet>
Newsgroups	comp.lang.c
Subject	Computed values don't tie up
Date	2012-04-03 19:29 +0000
Message-ID	<alpine.LNX.2.00.1204031912440.4639@rebelCode.slacknet> (permalink)

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I'm reading 'C Programming: A Modern Approach' by KN King.

If I run celcius.c (as below) and enter a value of 32 (or 32.0) I am given 
the equivalent celcius temperature as -2.2. Surely it should be zero?

/* Converts a Fahrenheit temperature to Celcius */

#include <stdio.h>

#define FREEZING_PT 32.0f
#define SCALE_FACTOR (5.0f / 9.0f)

int main(void)
{
 	float fahrenheit, celcius;

 	printf("Enter Fahrenheit temperatue: ");
 	scanf("%f", &fahrenheit);

 	celcius = (fahrenheit - FREEZING_PT) * SCALE_FACTOR;

 	printf("Celcius equivalent: ".1f", celcius);

 	return 0;
}

-- 
Robert

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Computed values don't tie up rkfb <rkfb@rebelCode.slacknet> - 2012-04-03 19:29 +0000
  Re: Computed values don't tie up James Kuyper <jameskuyper@verizon.net> - 2012-04-03 14:57 -0400
    Re: Computed values don't tie up Robert <rkfb1965@googlemail.com> - 2012-04-03 21:37 +0000
      Re: Computed values don't tie up Robert <rkfb1965@googlemail.com> - 2012-04-03 21:39 +0000
      Re: Computed values don't tie up Ike Naar <ike@iceland.freeshell.org> - 2012-04-03 20:52 +0000
        Re: Computed values don't tie up James Kuyper <jameskuyper@verizon.net> - 2012-04-03 16:56 -0400
          Re: Computed values don't tie up "BartC" <bc@freeuk.com> - 2012-04-03 22:11 +0100
      Re: Computed values don't tie up "BartC" <bc@freeuk.com> - 2012-04-03 21:53 +0100
        Re: Computed values don't tie up Robert <rkfb1965@googlemail.com> - 2012-04-03 22:56 +0000
      Re: Computed values don't tie up Geoff <geoff@invalid.invalid> - 2012-04-03 20:05 -0700
      Re: Computed values don't tie up Martin Ambuhl <mambuhl@earthlink.net> - 2012-04-04 00:38 -0400
  Re: Computed values don't tie up "BartC" <bc@freeuk.com> - 2012-04-03 21:04 +0100
    Re: Computed values don't tie up Robert <rkfb1965@googlemail.com> - 2012-04-03 21:38 +0000
  Re: Computed values don't tie up Kleuske <kleuske@nowhere.net> - 2012-04-03 23:09 +0000
    Re: Computed values don't tie up Ben Bacarisse <ben.usenet@bsb.me.uk> - 2012-04-04 04:42 +0100

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