Path: utzoo!attcan!uunet!mcvax!hp4nl!eutrc3!wzv!wietse
From: wietse@wzv.UUCP (Wietse Z. Venema)
Newsgroups: comp.lang.c
Subject: Re: #include <is.h>
Summary: let the library do the hard work
Keywords: something extra...
Message-ID: <175@wzv.UUCP>
Date: 21 Dec 88 22:38:04 GMT
References: <354@greens.UUCP>
Reply-To: wietse@wzv.UUCP (Wietse Z. Venema)
Organization: Eindhoven University of Technology, The Netherlands
Lines: 23

In article <354@greens.UUCP> matthew@sunpix.UUCP ( Sun NCAA) writes:
>                                                         But no where could
>I find a function to validate the string to see if it did contain a number
>that atof(); would correctly interpret.
>...
>[BTW, isfloat(); can double for isdouble(); as can isint(); for islong();]
>

int isfloat(s)	/* wants a null-terminated string with f.p. number */
char *s;
{
	char junk = 0;
	float fval;

	return (sscanf(s,"%f%c",&fval,&junk) == 1);
}

Of course, you will want to keep the result of the string-to-float
conversion.
-- 
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