13 lines
313 B
Perl
13 lines
313 B
Perl
sub dotprod
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{
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my($vec_a, $vec_b) = @_;
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die "they must have the same size\n" unless @$vec_a == @$vec_b;
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my $sum = 0;
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$sum += $vec_a->[$_] * $vec_b->[$_] for 0..$#$vec_a;
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return $sum;
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}
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my @vec_a = (1,3,-5);
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my @vec_b = (4,-2,-1);
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print dotprod(\@vec_a,\@vec_b), "\n"; # 3
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