/**
 * This is your typical header comment
 */
int foo(int bar)
{
   int idx;
   int res = 0;      // trailing comment
                     // that spans two lines
   for (idx = 1; idx < bar; idx++)
      /* comment in virtual braces */
      res += idx;

   res *= idx;        // some comment

   // almost continued, but a NL in between

// col1 comment in level 1
   return(res);
}

// col1 comment in level 0