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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feof

feof(3) 						     Library Functions Manual							   feof(3)

NAME

       feof - Tests EOF on a stream

LIBRARY

       Standard C Library (libc)

SYNOPSIS

       #include <stdio.h>

       int feof(
	       FILE *stream);

STANDARDS

       Interfaces documented on this reference page conform to industry standards as follows:

       feof(): XSH5.0

       Refer to the standards(5) reference page for more information about industry standards and associated tags.

PARAMETERS

       Specifies the input stream.

DESCRIPTION

       The feof() function tests the EOF (end-of-file) condition on the specified stream.

NOTES

       [Tru64  UNIX]  The feof() function may be a macro (depending on the compile-time definitions used in the source).  Consequently, you cannot
       use this interface where a function is necessary; for example, a subroutine pointer cannot point to it.

RETURN VALUES

       If EOF has previously been detected reading the input stream specified by the stream parameter, a nonzero value is returned.  Otherwise,  a
       value of 0 (zero) is returned.

RELATED INFORMATION

       Functions: ferror(3), fileno(3), clearerr(3), fopen(3)

       Standards: standards(5) delim off

																	   feof(3)