title: chars to 2´s complement in C
body: <p>I have two char´s that I want my program to interpert as one 2´s complement value. For example if I have:</p>
  
  <pre><code>char i = 0xFF;
  char j = 0xF0;
  
  int k = ((i&lt;&lt;8) | j);
  </code></pre>
  
  <p>Then I want C to interpert k as 2´s complement (so -16 in stead of 65520). How do I do this?</p>