title: error: expression must have integral or enum type
body: <p>In CUDA C, why does the following code </p>
  
  <pre><code>findMinMax&lt;&lt;sizeof(lum)/1024,1024&gt;&gt;(lum,&amp;min_logLum,&amp;max_logLum);
  </code></pre>
  
  <p>give this error?</p>
  
  <pre><code>error: expression must have integral or enum type
  </code></pre>