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PORemoving '#include <algorithm>' doesn't break the code
 

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  1. PORemoving '#include <algorithm>' doesn't break the code
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    <p>Maybe this is a very silly question, but the book I'm reading instructed me to write a piece of code that uses algorithms to scramble and order the elements in a vector. To do this the book tells me to use the algorithms library from the main C++ library. Alright, so far I understand it, but after writing the code I wanted to see what would break if I would remove this library from the top-part of my code, and it surprised me that everything still worked.</p> <p>This is the code I'm talking about. When I remove '#include algorithm' from the top-part of the code, nothing breaks. How can this be? Isn't the 'random_shuffle' part supposed to break when not using this library?</p> <pre><code>#include &lt;iostream&gt; #include &lt;vector&gt; #include &lt;algorithm&gt; #include &lt;ctime&gt; #include &lt;cstdlib&gt; using namespace std; int main() { vector&lt;int&gt;::const_iterator iter; cout &lt;&lt; "Creating a list of scores."; vector&lt;int&gt; scores; scores.push_back(1500); scores.push_back(3500); scores.push_back(7500); cout &lt;&lt; "\nHigh Scores:\n"; for (iter = scores.begin(); iter != scores.end(); ++iter) { cout &lt;&lt; *iter &lt;&lt; endl; } cout &lt;&lt; "\nFinding a score."; int score; cout &lt;&lt; "\nEnter a score to find: "; cin &gt;&gt; score; iter = find(scores.begin(), scores.end(), score); if (iter != scores.end()) { cout &lt;&lt; "Score found.\n"; } else { cout &lt;&lt; "Score not found.\n"; } cout &lt;&lt; "\nRandomizing scores."; srand(static_cast&lt;unsigned int&gt;(time(0))); random_shuffle(scores.begin(), scores.end()); cout &lt;&lt; "\nHigh Scores:\n"; for (iter = scores.begin(); iter != scores.end(); ++iter) { cout &lt;&lt; *iter &lt;&lt; endl; } cout &lt;&lt; "\nSorting scores."; sort(scores.begin(), scores.end()); cout &lt;&lt; "\nHigh Scores:\n"; for (iter = scores.begin(); iter != scores.end(); ++iter) { cout &lt;&lt; *iter &lt;&lt; endl; } system("pause"); return 0; } </code></pre>
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    1. COwhich compiler? if I remove `#include <algorithm>` in VS2010 it fails to compile.
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    2. COI'm using NetBeans IDE 7.1 and MinGW.
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