title: Calling a C function messaging style, in objective-c
body: <p>if I have:</p>
  
  <p>test.c</p>
  
  <pre><code>int test_func(){
  
  
          }
  </code></pre>
  
  <p>And  I wanted to do :</p>
  
  <p>test.m</p>
  
  <pre><code>[self test_func]
  </code></pre>
  
  <p>How should my <code>.h</code> files be set up with respect to the <code>test.c</code> file. 
  I have seen a question like this answered here but I failed to bookmark it, and I can't track it down. It involved an <code>.h</code> file with an <code>extern</code> command. Any help would be appreciated.</p>