Posted by Good Man on 10/31/07 19:41

Pupkin <spamagnet@dorrk.com> wrote in news:MPG.21926fd8833b9cbb9897e5
@news.giganews.com:

> Hi,
>
> If I'm using fwrite to append text to a file, is it possible to set the
> pointer to a specific line # at which to insert the text, rather than
> the beginning or end of the file?
>
> Thanks.
>

the easiest way would be something along the lines of:

1) fread your source file into a variable
2) fopen a new file for writing
3) go through your source file line-by-line using a loop
4) for each line you read, fwrite it to your new file (keeping an eye out
for the line number you want to change... when you find it, change it and
write it to your new file)
5) close the files

your source file remains unchanged (delete it if you want) and you have a
new file that you can use.... and of course you can just copy/rename this
new file to have the same one as your old one, so that it's next up for
reading/editing.

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