Dave Cross wrote:

>
> > #! usr/bin/perl
> > use strict;
> >
> > open (FILE_IN, "pslbingocard.dat")|| die "failed to open file\n";
>
> You don't check the result of opening the output file.

I think, in general,  that it is good programming practice that you check the opening 
of the output file.
What if your input file inludes a bad path?

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