/** * Main program. * * @param array $args Command-line arguments. * @return integer Zero on success; non-zero on failure. */ public static function main($args) { $status = 0; printf("Application program number 2.\n"); printf("Should be: dbfaceg.\n"); $tree = self::buildTree(ord('a'), ord('g')); Algorithms::breadthFirstTraversal($tree); return $status; }