Happy numbers: Difference between revisions
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Walterpachl (talk | contribs) (→{{header|REXX}}: replace old versions) |
Not a robot (talk | contribs) (Add ABC) |
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</pre> |
</pre> |
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=={{header|ABC}}== |
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<syntaxhighlight lang="ABC">HOW TO RETURN square.digit.sum n: |
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PUT 0 IN sum |
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WHILE n>0: |
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PUT n mod 10 IN digit |
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PUT sum + digit ** 2 IN sum |
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PUT floor (n/10) IN n |
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RETURN sum |
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HOW TO REPORT happy n: |
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PUT {} IN seen |
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WHILE n not.in seen: |
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INSERT n IN seen |
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PUT square.digit.sum n IN n |
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REPORT n=1 |
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HOW TO RETURN next.happy n: |
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PUT n+1 IN n |
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WHILE NOT happy n: PUT n+1 IN n |
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RETURN n |
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PUT 0 IN n |
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FOR i IN {1..8}: |
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PUT next.happy n IN n |
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WRITE n/</syntaxhighlight> |
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{{out}} |
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<Pre>1 |
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7 |
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10 |
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13 |
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19 |
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23 |
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28 |
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31</pre> |
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=={{header|ACL2}}== |
=={{header|ACL2}}== |
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<syntaxhighlight lang="lisp">(include-book "arithmetic-3/top" :dir :system) |
<syntaxhighlight lang="lisp">(include-book "arithmetic-3/top" :dir :system) |
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