Substring primes: Difference between revisions
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m (→{{header|Phix}}: bugfix: deep_copy() calls missing.) |
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This tests a total of just 15 numbers for primality. |
This tests a total of just 15 numbers for primality. |
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<!--<lang Phix>(phixonline)--> |
<!--<lang Phix>(phixonline)--> |
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<span style="color: #008080;">with</span> <span style="color: #008080;">javascript_semantics</span> |
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<span style="color: #000080;font-style:italic;">--sequence tested = {} |
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--function a085823(integer p=0) |
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-- sequence res={}</span> |
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<span style="color: #008080;">function</span> <span style="color: #000000;">a085823</span><span style="color: #0000FF;">(</span><span style="color: #004080;">sequence</span> <span style="color: #000000;">res</span><span style="color: #0000FF;">={},</span> <span style="color: #000000;">tested</span><span style="color: #0000FF;">={},</span> <span style="color: #004080;">integer</span> <span style="color: #000000;">p</span><span style="color: #0000FF;">=</span><span style="color: #000000;">0</span><span style="color: #0000FF;">)</span> |
<span style="color: #008080;">function</span> <span style="color: #000000;">a085823</span><span style="color: #0000FF;">(</span><span style="color: #004080;">sequence</span> <span style="color: #000000;">res</span><span style="color: #0000FF;">={},</span> <span style="color: #000000;">tested</span><span style="color: #0000FF;">={},</span> <span style="color: #004080;">integer</span> <span style="color: #000000;">p</span><span style="color: #0000FF;">=</span><span style="color: #000000;">0</span><span style="color: #0000FF;">)</span> |
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<span style="color: #008080;">for</span> <span style="color: #000000;">i</span><span style="color: #0000FF;">=(</span><span style="color: #000000;">p</span><span style="color: #0000FF;">!=</span><span style="color: #000000;">0</span><span style="color: #0000FF;">)+</span><span style="color: #000000;">1</span> <span style="color: #008080;">to</span> <span style="color: #000000;">4</span> <span style="color: #008080;">do</span> |
<span style="color: #008080;">for</span> <span style="color: #000000;">i</span><span style="color: #0000FF;">=(</span><span style="color: #000000;">p</span><span style="color: #0000FF;">!=</span><span style="color: #000000;">0</span><span style="color: #0000FF;">)+</span><span style="color: #000000;">1</span> <span style="color: #008080;">to</span> <span style="color: #000000;">4</span> <span style="color: #008080;">do</span> |
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<span style="color: #000000;">t</span> <span style="color: #0000FF;">+=</span> <span style="color: #000000;">p</span><span style="color: #0000FF;">*</span><span style="color: #000000;">10</span> |
<span style="color: #000000;">t</span> <span style="color: #0000FF;">+=</span> <span style="color: #000000;">p</span><span style="color: #0000FF;">*</span><span style="color: #000000;">10</span> |
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<span style="color: #008080;">if</span> <span style="color: #7060A8;">is_prime</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">then</span> |
<span style="color: #008080;">if</span> <span style="color: #7060A8;">is_prime</span><span style="color: #0000FF;">(</span><span style="color: #000000;">t</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">then</span> |
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<span style="color: #000080;font-style:italic;">-- {res,tested} = a085823(res&t,tested,t)</span> |
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<span style="color: #0000FF;">{</span><span style="color: #000000;">res</span><span style="color: #0000FF;">,</span><span style="color: #000000;">tested</span><span style="color: #0000FF;">}</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">a085823</span><span style="color: #0000FF;">(</span><span style="color: #000000;">res</span><span style="color: #0000FF;">&</span><span style="color: #000000;">t</span><span style="color: #0000FF;">,</span><span style="color: #000000;">tested</span><span style="color: #0000FF;">,</span><span style="color: #000000;">t</span><span style="color: #0000FF;">)</span> |
<span style="color: #0000FF;">{</span><span style="color: #000000;">res</span><span style="color: #0000FF;">,</span><span style="color: #000000;">tested</span><span style="color: #0000FF;">}</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">a085823</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">deep_copy</span><span style="color: #0000FF;">(</span><span style="color: #000000;">res</span><span style="color: #0000FF;">)&</span><span style="color: #000000;">t</span><span style="color: #0000FF;">,</span><span style="color: #7060A8;">deep_copy</span><span style="color: #0000FF;">(</span><span style="color: #000000;">tested</span><span style="color: #0000FF;">),</span><span style="color: #000000;">t</span><span style="color: #0000FF;">)</span> <span style="color: #000080;font-style:italic;">-- [1] |
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-- res &= t |
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-- res &= a085823(t)</span> |
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<span style="color: #008080;">else</span> |
<span style="color: #008080;">else</span> |
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<span style="color: #000000;">tested</span> <span style="color: #0000FF;">&=</span> <span style="color: #000000;">t</span> |
<span style="color: #000000;">tested</span> <span style="color: #0000FF;">&=</span> <span style="color: #000000;">t</span> |
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<span style="color: #008080;">end</span> <span style="color: #008080;">for</span> |
<span style="color: #008080;">end</span> <span style="color: #008080;">for</span> |
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<span style="color: #008080;">return</span> <span style="color: #0000FF;">{</span><span style="color: #000000;">res</span><span style="color: #0000FF;">,</span><span style="color: #000000;">tested</span><span style="color: #0000FF;">}</span> |
<span style="color: #008080;">return</span> <span style="color: #0000FF;">{</span><span style="color: #000000;">res</span><span style="color: #0000FF;">,</span><span style="color: #000000;">tested</span><span style="color: #0000FF;">}</span> |
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<span style="color: #000080;font-style:italic;">-- return res</span> |
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<span style="color: #008080;">end</span> <span style="color: #008080;">function</span> |
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span> |
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<span style="color: #004080;">sequence</span> <span style="color: #0000FF;">{</span><span style="color: #000000;">res</span><span style="color: #0000FF;">,</span><span style="color: #000000;">tested</span><span style="color: #0000FF;">}</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">a085823</span><span style="color: #0000FF;">()</span> <span style="color: #000080;font-style:italic;">-- sort() if you prefer... |
<span style="color: #004080;">sequence</span> <span style="color: #0000FF;">{</span><span style="color: #000000;">res</span><span style="color: #0000FF;">,</span><span style="color: #000000;">tested</span><span style="color: #0000FF;">}</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">a085823</span><span style="color: #0000FF;">()</span> <span style="color: #000080;font-style:italic;">-- sort() if you prefer... |
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--sequence res = a085823() -- sort() if you prefer...</span> |
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<span style="color: #7060A8;">printf</span><span style="color: #0000FF;">(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"There are %d such A085823 primes: %V\n"</span><span style="color: #0000FF;">,{</span><span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">res</span><span style="color: #0000FF;">),</span><span style="color: #000000;">res</span><span style="color: #0000FF;">})</span> |
<span style="color: #7060A8;">printf</span><span style="color: #0000FF;">(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"There are %d such A085823 primes: %V\n"</span><span style="color: #0000FF;">,{</span><span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">res</span><span style="color: #0000FF;">),</span><span style="color: #000000;">res</span><span style="color: #0000FF;">})</span> |
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<span style="color: #7060A8;">printf</span><span style="color: #0000FF;">(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"%d innocent bystanders falsly accused of being prime (%d tests in total): %V\n"</span><span style="color: #0000FF;">,</span> |
<span style="color: #7060A8;">printf</span><span style="color: #0000FF;">(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"%d innocent bystanders falsly accused of being prime (%d tests in total): %V\n"</span><span style="color: #0000FF;">,</span> |
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<span style="color: #0000FF;">{</span><span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">tested</span><span style="color: #0000FF;">),</span><span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">tested</span><span style="color: #0000FF;">)+</span><span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">res</span><span style="color: #0000FF;">),</span><span style="color: #000000;">tested</span><span style="color: #0000FF;">})</span> |
<span style="color: #0000FF;">{</span><span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">tested</span><span style="color: #0000FF;">),</span><span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">tested</span><span style="color: #0000FF;">)+</span><span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">res</span><span style="color: #0000FF;">),</span><span style="color: #000000;">tested</span><span style="color: #0000FF;">})</span> |
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<!--</lang>--> |
<!--</lang>--> |
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<small>[1]It is possible that the compiler could be improved to avoid the need for those deep_copy().</small><br> |
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<small>The other seven commented out lines show a different way to avoid any use of deep_copy().</small> |
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{{out}} |
{{out}} |
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<pre> |
<pre> |