<iostream> vs. <iostream.h> vs. "iostream.h"
<p>When including a header file in C++, what's the difference between...</p>

<p>1) including the .h versus not including the .h when wrapping it in &lt; > signs?</p>

<pre><code>#include &lt;iostream&gt; vs. #include &lt;iostream.h&gt;
</code></pre>

<p>2) wrapping the header name in double quotes versus wrapping it in &lt; > signs? </p>

<pre><code>#include &lt;iostream.h&gt; vs. #include "iostream.h"
</code></pre>

<p>Thanks in advance!</p>
