{ public: tixing();//³õʼ»¯ void SetValue(double LowLimit1,double UpLimit1);//ÉèÖûý·ÖÉÏÏÂÏÞÖµ double f(double x);//º¯Êýf(x) virtual double Result(void);//»ý·Ö½á¹û,Ð麯Êý virtual void wucha(void);//Îó²î·¶Î§,Ð麯Êý protected: double LowLimit;//ÉÏÏÞ d