Increasing gaps between consecutive Niven numbers: Difference between revisions
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(→{{header|ALGOL 68}}: Tweak) |
m (→{{header|Phix}}: added syntax colouring, marked p2js compatible) |
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=={{header|Phix}}== |
=={{header|Phix}}== |
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Replaced sum(digits) in the original with sd, otherwise no great attempt to optimise |
Replaced sum(digits) in the original with sd, otherwise no great attempt to optimise |
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<!--<lang Phix>(phixonline)--> |
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<lang Phix>integer n = 1, prev = 1, g, gap = 0, count = 1, sd = 1 |
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<span style="color: #008080;">with</span> <span style="color: #008080;">javascript_semantics</span> |
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sequence digits={1} |
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<span style="color: #004080;">integer</span> <span style="color: #000000;">n</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">1</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">prev</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">1</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">g</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">gap</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">0</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">count</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">1</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">sd</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">1</span> |
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<span style="color: #004080;">sequence</span> <span style="color: #000000;">digits</span><span style="color: #0000FF;">={</span><span style="color: #000000;">1</span><span style="color: #0000FF;">}</span> |
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procedure nNiven() |
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while 1 do |
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<span style="color: #008080;">procedure</span> <span style="color: #000000;">nNiven</span><span style="color: #0000FF;">()</span> |
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n += 1 |
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<span style="color: #008080;">while</span> <span style="color: #000000;">1</span> <span style="color: #008080;">do</span> |
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for i=length(digits) to 0 by -1 do |
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<span style="color: #000000;">n</span> <span style="color: #0000FF;">+=</span> <span style="color: #000000;">1</span> |
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if i=0 then |
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<span style="color: #008080;">for</span> <span style="color: #000000;">i</span><span style="color: #0000FF;">=</span><span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">digits</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">to</span> <span style="color: #000000;">0</span> <span style="color: #008080;">by</span> <span style="color: #0000FF;">-</span><span style="color: #000000;">1</span> <span style="color: #008080;">do</span> |
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digits = prepend(digits,1) |
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<span style="color: #008080;">if</span> <span style="color: #000000;">i</span><span style="color: #0000FF;">=</span><span style="color: #000000;">0</span> <span style="color: #008080;">then</span> |
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exit |
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<span style="color: #000000;">digits</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">prepend</span><span style="color: #0000FF;">(</span><span style="color: #000000;">digits</span><span style="color: #0000FF;">,</span><span style="color: #000000;">1</span><span style="color: #0000FF;">)</span> |
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end if |
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<span style="color: #008080;">exit</span> |
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<span style="color: #008080;">end</span> <span style="color: #008080;">if</span> |
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digits[i] += 1 |
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<span style="color: #008080;">if</span> <span style="color: #000000;">digits</span><span style="color: #0000FF;">[</span><span style="color: #000000;">i</span><span style="color: #0000FF;">]<</span><span style="color: #000000;">9</span> <span style="color: #008080;">then</span> |
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exit |
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<span style="color: #000000;">digits</span><span style="color: #0000FF;">[</span><span style="color: #000000;">i</span><span style="color: #0000FF;">]</span> <span style="color: #0000FF;">+=</span> <span style="color: #000000;">1</span> |
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end if |
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<span style="color: #008080;">exit</span> |
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<span style="color: #008080;">end</span> <span style="color: #008080;">if</span> |
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sd -= 9 |
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<span style="color: #000000;">digits</span><span style="color: #0000FF;">[</span><span style="color: #000000;">i</span><span style="color: #0000FF;">]</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">0</span> |
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end for |
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<span style="color: #000000;">sd</span> <span style="color: #0000FF;">-=</span> <span style="color: #000000;">9</span> |
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sd += 1 |
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<span style="color: #008080;">end</span> <span style="color: #008080;">for</span> |
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if remainder(n,sd)=0 then exit end if |
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<span style="color: #000000;">sd</span> <span style="color: #0000FF;">+=</span> <span style="color: #000000;">1</span> |
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end while |
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<span style="color: #008080;">if</span> <span style="color: #7060A8;">remainder</span><span style="color: #0000FF;">(</span><span style="color: #000000;">n</span><span style="color: #0000FF;">,</span><span style="color: #000000;">sd</span><span style="color: #0000FF;">)=</span><span style="color: #000000;">0</span> <span style="color: #008080;">then</span> <span style="color: #008080;">exit</span> <span style="color: #008080;">end</span> <span style="color: #008080;">if</span> |
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end procedure |
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<span style="color: #008080;">end</span> <span style="color: #008080;">while</span> |
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<span style="color: #008080;">end</span> <span style="color: #008080;">procedure</span> |
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printf(1,"gap size Niven index Niven #\n") |
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atom t0 = time() |
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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;">"gap size Niven index Niven #\n"</span><span style="color: #0000FF;">)</span> |
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while n<=1_000_000_000 do |
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<span style="color: #004080;">atom</span> <span style="color: #000000;">t0</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">time</span><span style="color: #0000FF;">()</span> |
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nNiven() |
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<span style="color: #008080;">while</span> <span style="color: #000000;">n</span><span style="color: #0000FF;"><=</span><span style="color: #008080;">iff</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">platform</span><span style="color: #0000FF;">()=</span><span style="color: #004600;">JS</span><span style="color: #0000FF;">?</span><span style="color: #000000;">10_000_000</span><span style="color: #0000FF;">:</span><span style="color: #000000;">1_000_000_000</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">do</span> |
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g = n-prev |
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<span style="color: #000000;">nNiven</span><span style="color: #0000FF;">()</span> |
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if g>gap then |
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<span style="color: #000000;">g</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">n</span><span style="color: #0000FF;">-</span><span style="color: #000000;">prev</span> |
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string e = elapsed(time()-t0) |
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<span style="color: #008080;">if</span> <span style="color: #000000;">g</span><span style="color: #0000FF;">></span><span style="color: #000000;">gap</span> <span style="color: #008080;">then</span> |
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printf(1,"%,5d %,14d %,15d (%s)\n",{g, count, prev, e}) |
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<span style="color: #004080;">string</span> <span style="color: #000000;">e</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">elapsed</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">time</span><span style="color: #0000FF;">()-</span><span style="color: #000000;">t0</span><span style="color: #0000FF;">)</span> |
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gap = g |
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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;">"%,5d %,14d %,15d (%s)\n"</span><span style="color: #0000FF;">,{</span><span style="color: #000000;">g</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">count</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">prev</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">e</span><span style="color: #0000FF;">})</span> |
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end if |
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<span style="color: #000000;">gap</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">g</span> |
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prev = n |
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<span style="color: #008080;">end</span> <span style="color: #008080;">if</span> |
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count += 1 |
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<span style="color: #000000;">prev</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">n</span> |
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end while</lang> |
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<span style="color: #000000;">count</span> <span style="color: #0000FF;">+=</span> <span style="color: #000000;">1</span> |
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<span style="color: #008080;">end</span> <span style="color: #008080;">while</span> |
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<!--</lang>--> |
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{{out}} |
{{out}} |
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<pre> |
<pre> |
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