From:	Martin Ambuhl <mambuhl AT earthlink DOT net>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: how to use atof?
Date:	Sat, 04 Sep 1999 13:03:43 -0400
References:	<7qr9uh$3fk$1 AT thetenth DOT astat DOT de>
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Berti Drost wrote:
> 
> Hello,
> I have some troubles useing the command atof (convert string to double);
> the following code isn't produceing the correct results. Can anybody tell me
> what the mistake might be? (It occures also, if I use strtod; on the other
> hand, atoi (convert str to integer) is working perfectly:-( )
> 
> int     main(int argc, char *argv)
> {
>   char   *zahl="153.34";
>   char   *err;
>   double out_f;
>   out_f=atof(zahl);
> //  out_f=strtod(zahl,&err);
>   printf("strtod() : %f\n",out_f);
>   printf("err=%c\n",*err);
>   return(0);
> }

If this is your actual code, the only problems are the failure to
#include required headers, an incorrect argument to main(), and the
attempt to derefernece a wild pointer/  See what happens with this code:

#include <stdio.h>
#include <stdlib.h>

int main(int argc, char *argv[])    
{
    char *zahl = "153.34";
    char *err = 0;
    double out_f;
    out_f = atof(zahl);
    printf("atof() : %f\n", out_f);
    out_f = strtod(zahl, &err);
    printf("strtod() : %f\n", out_f);
    if (err) printf("err=%c\n", *err);
    return (0);
}


atof() : 153.340000
strtod() : 153.340000
err=


-- 
Martin Ambuhl	mambuhl AT earthlink DOT net

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