/**
 * This a simple brief.
 *
 * And the details goes here.
 * Multi lines are welcome.
 *
 * @param  num  leave a comment for parameter num.
 * @param  str  leave a comment for the second parameter.
 * @return      leave a comment for the returned value.
 */
int doxy_javadoc_example(int num, const char *str);