title: Defining Secs per year as Macro in C?
body: <p>In an MCQ Exam the 2 choices were:<br>
  <strong><code>#define SEC (60*60*24*365)</code></strong>  OR<br>
  <strong><code>#define SEC (60*60*24*365UL)</code></strong><br>
  Is there a difference between the two possibilities that makes one a better choice?</p>