Magic squares/Raku: Difference between revisions
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→{{header|Perl 6}}: Clean up and refactor a bit. Randomize the magic square generation.
Thundergnat (talk | contribs) (→{{header|Perl 6}}: Add a few comments) |
Thundergnat (talk | contribs) m (→{{header|Perl 6}}: Clean up and refactor a bit. Randomize the magic square generation.) |
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Rather than having multiple examples for different orders of magic square, this will generate a magic square for ''any'' valid n x n grid. Note that it generates a randomized, though correct magic square.
Invoke at the command line and pass in the desired size as a parameter.
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gen-sq($n);
my @r = ^$n .pick(*);
say .fmt("%{$i.chars}d", ' ') for @sq;▼
▲ say $_[@r].fmt("%{$i.chars}d", ' ') for @sq.pick(*);
say "\nThe magic number is ", [+] @sq[0].list;
Line 35 ⟶ 37:
my $y = 0;
@sq[$i % $n ?? $y !! $y++][($i-1) % $n] = $i++ for ^$n²;
my $
for
for $
(@sq[$
(@sq[
}
}
Line 48 ⟶ 50:
multi sub gen-sq ($n where {$n %% 2 and $n % 4}) { # singly even
my $h = $n div 2;
my $q = $n div 4;
gen-sq($h);
$i *= 4;
for ^$h -> $r {
for ^$h -> $c {
@sq[$r + $h; $c] = @sq[$r;$c] + $h² * 3;
@sq[$r; $c + $h] = @sq[$r;$c] + $h² * 2;
@sq[$r + $h; $c + $h] = @sq[$r;$c] + $h²;
}
for ^
next if $c == 0 and $r == ($h-1) div 2;
(@sq[$r
}
}
(@sq[
if $h > 4 {
for ^$h -> $r {
for ($n -
(@sq[$r;$c], @sq[$r + $h;$c]
}
}
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