title: Tricky C Program to find even and odd
body: <p>This is a challenging problem I came across while I was giving my internship exam in Microsoft. The question goes like this:</p>
  
  <blockquote>
    <p>User inputs a decimal number.  The output should show whether the number is even or odd subject to constraint that only one <code>printf</code>, and no binary operator, logical operator, arithmetic operator, <code>if-else</code> and <code>switch-case</code> can be used.</p>
  </blockquote>
  
  <p>So any ideas?</p>