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From: TRM900@psuvm.psu.edu (Tony R. Marasco)
Newsgroups: comp.lang.c
Subject: Random Access files
Message-ID: <90322.032603TRM900@psuvm.psu.edu>
Date: 18 Nov 90 08:26:03 GMT
Organization: Penn State University
Lines: 22

Hello.  I am trying to use random access files and have run into some
problems...

I am using _fopen_ with a "w+b" parameter to create the file (if it doesn't
exist).  If it exists, I use "r+b".  Otherwise it seems to erase the file
like PASCAL's _rewrite_.  How am I doing so far??

I am also using _fseek_ to position the file pointer (recnum*size of struct)
with SEEK_SET.  I do this before each _fread_ & _fwrite_.  The program
seems to "lose" a few bytes at the beginning of each _fread_.

What is more astounding is I can write a record that doesn't exist, but
I can't update a record that already exists.

Any ideas?  Is it my fault or Turbo C's?

Any help is greatly appreciated.
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| Tony Marasco                 |  "Questions are a burden for others.     |
| Penn State University        |   Answers are a prison for oneself."     |
| Schuylkill Haven, PA 17976   |     - The Prisoner                       |
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