"Dillon, John" wrote:
> According to
> http://vipe.technion.ac.il/~shlomif/lecture/Perl/Newbies/lecture2/argv.html
> the following program will do ...whatever (make a backup of files) and it
> takes the file specified at the command line. I guessed from this that one
> has a .pl file with the following script, execute it at c: by typing its
> name and then the program stops and asks you what file you want to specify.
> But this does not happen.
Why should it? What do you see in this code that would ask a question?
> So how do you get the filename into the script?
If you want an interactive program YOU have to do some work. Print the prompt, then
take standard input from <STDIN>.
print "Please enter filename to be copied\n";
my $filename = <STDIN>;
The program will then wait until the user hits the Enter key. Whatever they have
entered on the command line becomes the value of $filename.
>
>
> use strict;
>
> my $filename = $ARGV[0];
>
> open I, "<".$filename;
> open O, ">".$filename.".bak";
> print O join("",<I>);
> close(I);
> close(O);
>
Joseph
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