title: how make include import in flex/bison
body: <p>I'm making a programming language converter and, and it has import and include.</p>
  
  <p>For example:</p>
  
  <pre><code> import com.nanana.MyClassFile
   include "myfile.any"
  </code></pre>
  
  <p>I'm newbie which means I'm lost in how can I make it.
  I wondering if is possible parse another file while one is been parsing.</p>
  
  <p>And how can I do it?</p>
  
  <p>EDIT:</p>
  
  <p>The code I'm using to parse files in main function is:</p>
  
  <pre><code>yyin = fopen( argv[1], "r" ); 
  return yyparse();
  </code></pre>
  
  <p>Can I use this same code, or there is another?</p>