Does the following PERL program pass a list/array of numbers to the add an multiply subroutine as a referecenc

Does the following PERL program pass a list/array of numbers to the add and multiply subroutine as a referecence or does it not? And if doesn't how can make it do this.





my ($rtn, $len);





$len = @ARGV;





# If first argument is add, run add function; if multiply, run multiply


# function, otherwise warn user and end script


if ($ARGV[0] =~ /add/) {


$rtn = %26amp;add(@ARGV);


print "The sum is: $rtn\n";


}





elsif ($ARGV[0] =~ /multiply/) {


$rtn = %26amp;multiply(@ARGV);


print "The product is: $rtn\n";


}





else {


print "\nInvalid request, please use \"add\" or \"multiply\"\n";


print "followed by some numbers.\n";


}





# Subroutine definitions #


sub add


{


my ($sum, $i);


$sum = 0;


for ($i = 1; $i %26lt;= $len; $i++)


{


$sum += $_[$i];


}


$sum;


}


sub multiply


{


my ($product, $i);


$product = 1;


for ($i = 1; $i %26lt; $len; $i++)


{


$product *= $_[$i];


}


$product;


}

Does the following PERL program pass a list/array of numbers to the add an multiply subroutine as a referecenc
It does not. Calling subroutine(@list) passes the list by value, not by reference. To pass a reference, put \ before the array name:





multiply(\@ARGV);





You'll also need to change the subruotines to work with their arguments being an array reference, to something like:





sub add {


my $sum=0;


$sum += $_ for @{$_[0]};


return $sum;


}





(by the way, "Perl" is the language, "perl" is the interpreter, "PERL" does not exist)

birthday cards