Feof Post: 11405

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Top Forums Programming Feof Post 11405 by primal on Tuesday 4th of December 2001 07:27:38 PM

12-04-2001

Registered User

Feof

Hi Everyone,
I'm having problems with feof
I've storing my variables inside a file, and then in another program, opening that file and recalling the information.
The problem im having is that it's repeating the last set of entries in my while loop.
(if i have one set of product no., quantity, and price in my file, it repeats it twice. if i have two sets or more in my file, it repeats the last set twice)
I think it has something to do with how i have my while(!feof(file)) set up.
Does anyone know what's going on?

Code:

#include[stdio.h]
FILE *invfile;
int prod, qty;
float price;

void main()
    {
     invfile = fopen("file.dat","r");
     while(!feof(invfile))
       {
       fscanf(invfile,"%d %d %f", &prod, &qty, &price);
       printf("Product No.     = %d\n",prod);
       printf("Quantity        = %d\n",qty); 
       printf("Price           = %.2f\n\n",price);
       }
     fclose(invfile);
    }

Thanks!
primal

primal

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clearerr

ferror(3C)						   Standard C Library Functions 						ferror(3C)

NAME

       ferror, feof, clearerr, fileno - stream status inquiries

SYNOPSIS

       #include <stdio.h>

       int ferror(FILE *stream);

       int feof(FILE *stream);

       void clearerr(FILE *stream);

       int fileno(FILE *stream);

DESCRIPTION

       The  ferror()  function	returns  a  non-zero  value when an error has previously occurred reading from or writing to the named stream (see
       Intro(3)). It returns 0 otherwise.

       The feof() function returns a non-zero value when EOF has previously been detected reading the named input stream. It returns 0 otherwise.

       The clearerr() function resets the error indicator and EOF indicator to 0 on the named stream.

       The fileno() function returns the integer file descriptor associated with the named stream; see open(2).

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       open(2), Intro(3), fopen(3C), stdio(3C), attributes(5), standards(5)

SunOS 5.11							    17 Feb 2005 							ferror(3C)