On Fri, Jun 29, 2001 at 06:04:33PM -0400, Wang, Lanbo wrote:
> #!/usr/local/bin/perl
This is your first mistake. You forgot -w and use strict; always use both
when debugging code. It wouldn't have helped you here, but I guarantee you
it will in the future. So:
#!/usr/local/bin/perl -w
use strict;
> sub card{
>
> my %card_map;
> my ($num)=@_;
> @card_map{1..9}= qw(one two three four five six seven eight nine);
> if ($card_map{$num}) {
> $card_map{$num};
> } else {
> $num;
> }
> }
>
> while (<>) {
> chomp;
> print "card of $_ is:" &card($_), "\n";
Here's your problem, you forgot a comma after the first argument to print.
This is being evaluated as (in the case of "7" being input):
print "card of 7 is:" & "seven", "\n";
& is a bitwise operator, in this instance operating on strings. "card of 7
is" & "seven" results in "card".
What you should be doing is, of course:
print "card of $_ is", card($_), "\n":
The & is unnecessary.
> }
Michael
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