template <class T> class vector{
private:
	T* v; // address of storage for the vector
	int sz; //number of elements in vector
 
public:
	vector(int); // construct a new vector - provides sz
	T& operator[](int);// safe subscript - checks range
	T& elem(int); // unchecked subscript?pointer to element?
	/*
		...
	*/
 
};