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fulladder(a,b,c) = (s, r) where
s = (a ^ b) ^ c;
r = (a & b) + ((a ^ b) & c);
end where
adder<n>(a:[n], b:[n], c_in) = (o:[n], c_out) where
if n = 0 then
o = [];
c_out = c_in
else
(s_n, c_n1) = fulladder(a[0], b[0], c_in);
(s_n1, c_out) = adder<n-1>(a[1..], b[1..], c_n1);
o = s_n . s_n1
end if
end where
main(a:[8], b:[8]) = (o:[8], c) where
(o, c) = adder<8>(a,b,0)
end where
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