Modifying a file

Modifying a file

[Daniel Allex]

I have a file that is 13 lines long and I want to change the values of
the last 5 lines.  What's the best way to do this?

Re: Modifying a file

[Bobby D. Bryant]

On Tue, 29 Jul 2003 04:36:58 -0700, Daniel Allex wrote:

> I have a file that is 13 lines long and I want to change the values of
> the last 5 lines.  What's the best way to do this?

If it's a source file or data file you probably want to use a text editor
or language sensitive editor such as vi, emacs, and many others.

You could get more detailed suggestions if you said what was in the file
and what operating system it is on.

-- 
Bobby Bryant
Austin, Texas

Re: Modifying a file

[Stephen Leake]

"Bobby D. Bryant" <bdbryant@mail.utexas.edu> writes:

> On Tue, 29 Jul 2003 04:36:58 -0700, Daniel Allex wrote:
> 
> > I have a file that is 13 lines long and I want to change the values of
> > the last 5 lines.  What's the best way to do this?

Read in the whole file to an unconstrained array of an appropriate
type, change the data, write out a new file with the same name.

If you want a more detailed answer, you'll have to provide more info.
Note that this sounds like a homework problem; we don't do people's
homework for them.

> If it's a source file or data file you probably want to use a text editor
> or language sensitive editor such as vi, emacs, and many others.
> 
> You could get more detailed suggestions if you said what was in the file

Definitely necessary information.

> and what operating system it is on.

Part of the point of Ada's various file operations is to be OS
independent, so we _shouldn't_ need this information unless it turns
out that the standard Ada facilities can't do what they need.

-- 
-- Stephe