You can't change the value of $a by using it as a function parameter in MyGetFunc.

Sure you can, perl is perl :) 

sub lunch { $_[0]++ }
my $foo = 1;
warn $foo;
lunch($foo);
warn $foo;
__END__
1 at - line 3.
2 at - line 5.

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search for alias in perlsub

In reply to Re^2: Bit operation by Anonymous Monk
in thread Bit operation by toren

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