如何手动删除类的实例?例子:#include#includeclassCheese{private:stringbrand;floatcost;public:Cheese();//DefaultconstructorCheese(stringbrand,floatcost);//ParametrizedconstructorCheese(constCheese&rhs);//Copyconstrutor~Cheese();//Destructor//etc...otherusefulstufffollows}intmain(){Cheesecheddar("CabotClothboun