Zig-zag matrix: Difference between revisions

</pre>

=={{header|EMal}}==

<syntaxhighlight lang="emal">

fun zigzag = List by int n

List matrix = List[].with(n)

for int y = 0; y < n; y++ do matrix[y] = int[].with(n) end

int y, x = 1

for int value = 0; value < n * n; value++

matrix[y - 1][x - 1] = value

if (y + x) % 2 == 0

if x < n do x++

else do y += 2 end

if y > 1 do y-- end

else

if y < n do y++

else do x += 2 end

if x > 1 do x-- end

end

end

return matrix

end

fun dump = void by List matrix

int max = length([text] (matrix.length ** 2)) + 1

for each List row in matrix

for each int value in row

write(" " * (max - length([text] value)) + value)

end

writeLine()

end

end

dump(zigzag(5))

writeLine()

dump(zigzag(10))

</syntaxhighlight>

{{out}}

<pre>

0 1 5 6 14

2 4 7 13 15

3 8 12 16 21

9 11 17 20 22

10 18 19 23 24

0 1 5 6 14 15 27 28 44 45

2 4 7 13 16 26 29 43 46 63

3 8 12 17 25 30 42 47 62 64

9 11 18 24 31 41 48 61 65 78

10 19 23 32 40 49 60 66 77 79

20 22 33 39 50 59 67 76 80 89

21 34 38 51 58 68 75 81 88 90

35 37 52 57 69 74 82 87 91 96

36 53 56 70 73 83 86 92 95 97

54 55 71 72 84 85 93 94 98 99