摘要: num1 = $num1; } public function setNum2($num2){ $this->num2 = $num2; } public function getResult(){ return null; }}class add extends operation{ publ... 阅读全文
posted @ 2015-07-21 23:44 小战 阅读(240) 评论(0) 推荐(0) 编辑