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From: ark@alice.UucP (Andrew Koenig)
Newsgroups: net.lang.c
Subject: Re: Using SCANF with DOUBLE precision variables...
Message-ID: <6043@alice.uUCp>
Date: Wed, 10-Sep-86 16:13:19 EDT
Article-I.D.: alice.6043
Posted: Wed Sep 10 16:13:19 1986
Date-Received: Thu, 11-Sep-86 02:04:40 EDT
References: <3672@brl-smoke.ARPA>
Organization: Bell Labs, Murray Hill
Lines: 20

> 'Ello,
>       I've been doing a little matrix algebra in C lately, and in the process
> I have been wanting to read in some real numbers, preferably thru SCANF, but I
> get nothing but 0.000 returned when i try to put the result of a SCANF in a var
> declared as DOUBLE.  The only thing that I could think of was either writing my
> own algorithm, or reading the number in as FLOAT and storing it in the DOUBLE
> variable.  Perchance someone else has had this problem and found a better
> solution without re-inventing several wheels?  I guess there really isn't any
> reason why I just couldn't use FLOAT variables, but then there shouldn't be any
> reason why I can't use SCANF on DOUBLE vars either.
>      Thanks in advance,
>                        Dave

	float f;
	double d;

	scanf ("%f", &f);		/* should work */
	scanf ("%f", &d);		/* garbage */
	scanf ("%lf", &d);		/* should work */
	scanf ("%lf", &f);		/* garbage */