Date: Wed, 29 Oct 1997 17:38:50 -0800 (PST)
Message-Id: <199710300138.RAA10772@adit.ap.net>
Mime-Version: 1.0
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To: jb AT netcom DOT ca, djgpp AT delorie DOT com
From: Nate Eldredge <eldredge AT ap DOT net>
Subject: Re: Using data from file, line by line using C?
Precedence: bulk

At 11:19  10/28/1997 -0500, jb AT netcom DOT ca wrote:
>Hi,
>
>I was wondering if anyone knows what kind of code is required to do the
>following.
>
>e.g. You have a file in the home directory of the program with
>customers' names. (one name per line)
>
>You want the program to bring up each persons' name one by one, and give
>the option to write the persons' name with a variable to a file, say
>maybe into chart form.
>So that the output would be something like this:
>
>
>Name 1| Variable 1
>Name 2| Variable 2
>Name 3| Variable 3
>Name 4| Variable 4
>Name 5| Variable 5
>Name 6| Variable 6
>....
>
>and next time you run the program and it brings up the name, you want it
>to tack on another column to the chart, with a different variable.
Offhand, I would say you'd do something like this:

- Read a line (using fgets() or equivalent)
- Get the data you need, like the name (using sscanf or string functions to
parse)
- Write out the line to a new file, ommiting the \n
- Write the new data, followed by \n
- Repeat...
- Use unlink() and rename() to move the new file over the old one.

HTH

Nate Eldredge
eldredge AT ap DOT net