The reason this won't work the way you think:
(@ary1, $num) = read_data(\@tmpary, $tmpsclr);is documented in the documentation on subs. The return from a sub is always a flat list. Perl shoves everything into @ary1, leaving $num empty.
A reasonable alternative is to return an array ref and a scalar:
($ary1ref, $num) = read_data(...);
@ary1 = @$ary1ref; # silly, but gets the point across
# ... later ...
sub read_data
{
# ...
return \@retary, $count;
}
HTH
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