title: Why should I not #include <bits/stdc++.h>?
body: <p>I posted a question with my code whose only <code>#include</code> directive was the following:</p>
  
  <pre><code>#include &lt;bits/stdc++.h&gt;
  </code></pre>
  
  <p>My teacher told me to do this, but in the comments section I was informed that I shouldn't.</p>
  
  <p>Why?</p>