Knapsack problem/Continuous: Difference between revisions
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→{{header|Phix}}: added syntax colouring, marked p2js compatible
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=={{header|Phix}}==
<!--<lang Phix>
<span style="color: #008080;">with</span> <span style="color: #008080;">javascript_semantics</span>
<span style="color: #008080;">constant</span> <span style="color: #000000;">meats</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{</span>
<span style="color: #000080;font-style:italic;">--Item Weight (kg) Price (Value)</span>
<span style="color: #0000FF;">{</span><span style="color: #008000;">"beef"</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">3.8</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">36</span><span style="color: #0000FF;">},</span>
<span style="color: #0000FF;">{</span><span style="color: #008000;">"pork"</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">5.4</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">43</span><span style="color: #0000FF;">},</span>
<span style="color: #0000FF;">{</span><span style="color: #008000;">"ham"</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">3.6</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">90</span><span style="color: #0000FF;">},</span>
<span style="color: #0000FF;">{</span><span style="color: #008000;">"greaves"</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">2.4</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">45</span><span style="color: #0000FF;">},</span>
<span style="color: #0000FF;">{</span><span style="color: #008000;">"flitch"</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">4.0</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">30</span><span style="color: #0000FF;">},</span>
<span style="color: #0000FF;">{</span><span style="color: #008000;">"brawn"</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">2.5</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">56</span><span style="color: #0000FF;">},</span>
<span style="color: #0000FF;">{</span><span style="color: #008000;">"welt"</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">3.7</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">67</span><span style="color: #0000FF;">},</span>
<span style="color: #0000FF;">{</span><span style="color: #008000;">"salami"</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">3.0</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">95</span><span style="color: #0000FF;">},</span>
<span style="color: #0000FF;">{</span><span style="color: #008000;">"sausage"</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">5.9</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">98</span><span style="color: #0000FF;">}}</span>
<span style="color: #008080;">function</span> <span style="color: #000000;">by_weighted_value</span><span style="color: #0000FF;">(</span><span style="color: #004080;">integer</span> <span style="color: #000000;">i</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">j</span><span style="color: #0000FF;">)</span>
<span style="color: #004080;">atom</span> <span style="color: #0000FF;">{?,</span><span style="color: #000000;">weighti</span><span style="color: #0000FF;">,</span><span style="color: #000000;">pricei</span><span style="color: #0000FF;">}</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">meats</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;">weightj</span><span style="color: #0000FF;">,</span><span style="color: #000000;">pricej</span><span style="color: #0000FF;">}</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">meats</span><span style="color: #0000FF;">[</span><span style="color: #000000;">j</span><span style="color: #0000FF;">]</span>
<span style="color: #008080;">return</span> <span style="color: #7060A8;">compare</span><span style="color: #0000FF;">(</span><span style="color: #000000;">pricej</span><span style="color: #0000FF;">/</span><span style="color: #000000;">weightj</span><span style="color: #0000FF;">,</span><span style="color: #000000;">pricei</span><span style="color: #0000FF;">/</span><span style="color: #000000;">weighti</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
<span style="color: #004080;">sequence</span> <span style="color: #000000;">tags</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">custom_sort</span><span style="color: #0000FF;">(</span><span style="color: #000000;">by_weighted_value</span><span style="color: #0000FF;">,</span><span style="color: #7060A8;">tagset</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">meats</span><span style="color: #0000FF;">)))</span>
<span style="color: #004080;">atom</span> <span style="color: #000000;">weight</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">15</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">worth</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">0</span>
<span style="color: #008080;">for</span> <span style="color: #000000;">i</span><span style="color: #0000FF;">=</span><span style="color: #000000;">1</span> <span style="color: #008080;">to</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">tags</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">do</span>
<span style="color: #004080;">object</span> <span style="color: #0000FF;">{</span><span style="color: #000000;">desc</span><span style="color: #0000FF;">,</span><span style="color: #000000;">wi</span><span style="color: #0000FF;">,</span><span style="color: #000000;">price</span><span style="color: #0000FF;">}</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">meats</span><span style="color: #0000FF;">[</span><span style="color: #000000;">tags</span><span style="color: #0000FF;">[</span><span style="color: #000000;">i</span><span style="color: #0000FF;">]]</span>
<span style="color: #004080;">atom</span> <span style="color: #000000;">amt</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">min</span><span style="color: #0000FF;">(</span><span style="color: #000000;">wi</span><span style="color: #0000FF;">,</span><span style="color: #000000;">weight</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;">"%3.1fkg %s %s\n"</span><span style="color: #0000FF;">,{</span><span style="color: #000000;">amt</span><span style="color: #0000FF;">,</span><span style="color: #008080;">iff</span><span style="color: #0000FF;">(</span><span style="color: #000000;">amt</span><span style="color: #0000FF;">=</span><span style="color: #000000;">wi</span><span style="color: #0000FF;">?</span><span style="color: #008000;">"(all the)"</span><span style="color: #0000FF;">:</span><span style="color: #008000;">"of"</span><span style="color: #0000FF;">),</span><span style="color: #000000;">desc</span><span style="color: #0000FF;">})</span>
<span style="color: #000000;">worth</span> <span style="color: #0000FF;">+=</span> <span style="color: #0000FF;">(</span><span style="color: #000000;">amt</span><span style="color: #0000FF;">/</span><span style="color: #000000;">wi</span><span style="color: #0000FF;">)*</span><span style="color: #000000;">price</span>
<span style="color: #000000;">weight</span> <span style="color: #0000FF;">-=</span> <span style="color: #000000;">amt</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">weight</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>
<span style="color: #008080;">end</span> <span style="color: #008080;">for</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;">"Total value: %f\n"</span><span style="color: #0000FF;">,{</span><span style="color: #000000;">worth</span><span style="color: #0000FF;">})</span>
<!--</lang>-->
{{out}}
<pre>
3.0kg (all
3.6kg (all
2.5kg (all
2.4kg (all
3.5kg of welt
Total value: 349.378378
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