title: Preprocessor Includes, when to use <> or ""
body: <blockquote>
    <p><strong>Possible Duplicate:</strong><br>
    <a href="https://stackoverflow.com/questions/21593/what-is-the-difference-between-include-filename-and-include-filename">What is the difference between #include &lt;filename&gt; and #include &ldquo;filename&rdquo;?</a>  </p>
  </blockquote>
  
  
  
  <p>I've hit a bit of a problem in my C learning, I had a quick search of the questions on this site and couldn't find an answer to this question. It's probably a bit stupid, but here goes.</p>
  
  <p>I've been following some c tutorials and throughout the book all includes have been done like this:</p>
  
  <pre><code>#include &lt;stdio.h&gt;
  #include &lt;string.h&gt; etc. etc.
  </code></pre>
  
  <p>All of a sudden however, they've dropped this bomb shell:</p>
  
  <pre><code>#include &lt;stdio.h&gt;
  #include "structSize.h"
  </code></pre>
  
  <p>With absolutely no explanation as to why <code>"..."</code> was used, I'm completely dumbfounded. Could anyone perhaps provide an explanation as to what is the difference between <code>&lt;...&gt;</code> and <code>"..."</code> and when to use each one.</p>
  
  <p>Thanks for the help.<br>
  Regards,<br>
  Mike </p>