Exceptions w/ Classes (version2)
		struct bad_index {          //bad index exception type   long index; }; class dyn_a1 {   public:     explicit dyn_a1(INDEX) throw(bad_alloc); //constructor     ~dyn_a1() throw();                       //destructor     int &operator[](INDEX) throw(bad_index); //subscript op   private:     dyn_a1(const dyn_a1 &);            //prohibit copy constructor     dyn_a1 &operator=(const dyn_a1 &); //prohibit assign     INDEX d1;               //# of elements in 1D array     int* a0;                //base address of all elements };