title: Highlighting parts of a web document
body: <p>The following is how code looks on stack overflow:</p>
  <pre><code>float foo(int a, float b, char c){
      float d = a*b;
      printf(&quot;%c&quot;, c);
      return d;
  }
  </code></pre>
  <p>I wish to highlight code in a similar manner. How does one achieve this?</p>