N-queens problem: Difference between revisions
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=={{header|EasyLang}}== |
=={{header|EasyLang}}== |
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<syntaxhighlight lang="easylang"> |
<syntaxhighlight lang="easylang"> |
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subr show_sol |
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print "Solution " & n_sol |
print "Solution " & n_sol |
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print "" |
print "" |
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for i |
for i = 1 to n |
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write " " |
write " " |
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for j |
for j = 1 to n |
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if j = x[i] |
if j = x[i] |
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write "Q " |
write "Q " |
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subr test |
subr test |
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ok = 1 |
ok = 1 |
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for i |
for i = 1 to y - 1 |
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if x[y] = x[i] or abs (x[i] - x[y]) = abs (y - i) |
if x[y] = x[i] or abs (x[i] - x[y]) = abs (y - i) |
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ok = 0 |
ok = 0 |
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n = 8 |
n = 8 |
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len x[] n |
len x[] n |
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y = |
y = 1 |
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x[ |
x[1] = 1 |
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while y >= |
while y >= 1 |
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call test |
call test |
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if ok = 1 and y + 1 < |
if ok = 1 and y + 1 <= n |
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y += 1 |
y += 1 |
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x[y] = |
x[y] = 1 |
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else |
else |
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if ok = 1 |
if ok = 1 |
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. |
. |
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. |
. |
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while y >= |
while y >= 1 and x[y] = n |
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y -= 1 |
y -= 1 |
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. |
. |
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if y >= |
if y >= 1 |
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x[y] += 1 |
x[y] += 1 |
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. |
. |
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. |
. |
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. |
. |
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print n_sol & " solutions" |
print n_sol & " solutions" |
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</syntaxhighlight> |
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{{out}} |
{{out}} |
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<pre>Solution 1 |
<pre>Solution 1 |
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