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Ethiopian multiplication: Difference between revisions
Added Oz example.
(added factor implemenation) |
(Added Oz example.) |
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disp(ethiopicmult(17, 34, true))</lang>
=={{header|Oz}}==
<lang oz>declare
fun {Halve X} X div 2 end
fun {Double X} X * 2 end
fun {Even X} {Abs X mod 2} == 0 end %% standard function: Int.isEven
fun {EthiopicMult X Y}
X >= 0 = true %% assert: X must not be negative
Rows = for
L in X;L>0;{Halve L}
R in Y;true;{Double R}
collect:C
do
{C L#R}
end
OddRows = {Filter Rows fun {$ L#_} {Not {Even L}} end}
in
{FoldL OddRows fun {$ Z _#R} Z+R end 0}
end
in
{Show {EthiopicMult 17 34}}</lang>
=={{header|Perl}}==
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