[Code C]:Write in to file

[Bertram]

Hi all


It possible write in specific position, in to file.txt previously written,
without losing the content?

Thanks

Regards

[Barry Schwarz]

On Sun, 21 Apr 2013 15:27:39 +0200, "Bertram" <nos...@nospam.org>
wrote:

>It possible write in specific position, in to file.txt previously written,
>without losing the content?

Only if you are appending to the end of the file. If you write data
anywhere before the end, the new data will replace the old.

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[Francis Glassborow]

Or if you are over-writing the contents. Generally edits involve
insertions and/or deletions and that requires a new file.

Francis

[Bill Gill]

The most common procedure is to write the data from the file
to a new file one piece at a time and insert the new data at
the correct place. When you have the whole file, with the
insertions, you delete the old file and rename the new file
to match the old one.

Bill

[Geoff]

On Sun, 21 Apr 2013 15:27:39 +0200, "Bertram" <nos...@nospam.org>
wrote:

>
>

To insert new data into a file you must open a new file, copy the data
from the beginning of the original file into the new file up to the
point where you want to insert new data, write your new data, pick up
copying the remaining data from the original file to the end of the
file, close the new and old files, delete the old file and rename the
new file to replace the old file.

[Bertram]

Ok.

Many thanks!

Regards