21 lines
637 B
Julia
21 lines
637 B
Julia
function checkdigit(n)
|
|
matrix = (
|
|
(0, 3, 1, 7, 5, 9, 8, 6, 4, 2),
|
|
(7, 0, 9, 2, 1, 5, 4, 8, 6, 3),
|
|
(4, 2, 0, 6, 8, 7, 1, 3, 5, 9),
|
|
(1, 7, 5, 0, 9, 8, 3, 4, 2, 6),
|
|
(6, 1, 2, 3, 0, 4, 5, 9, 7, 8),
|
|
(3, 6, 7, 4, 2, 0, 9, 5, 8, 1),
|
|
(5, 8, 6, 9, 7, 2, 0, 1, 3, 4),
|
|
(8, 9, 4, 5, 3, 6, 2, 0, 1, 7),
|
|
(9, 4, 3, 8, 6, 1, 7, 2, 0, 5),
|
|
(2, 5, 8, 1, 4, 3, 6, 7, 9, 0))
|
|
row = 0
|
|
for d in string(n)
|
|
row = matrix[row + 1][d - '0' + 1]
|
|
end
|
|
return row
|
|
end
|
|
|
|
foreach(i -> println("$i validates as: ", checkdigit(string(i)) == 0), [5724, 5727, 112946])
|