Smarter pointer

 

// A generic smart pointer class

template <class T>

class SmartPtr

{

   T *ptr;  // Actual pointer

public:

   // Constructor

   explicit SmartPtr(T *p = NULL) { ptr = p; }

 

   // Destructor

   ~SmartPtr() { delete(ptr); }

 

   // Overloading dereferncing operator

   T & operator * () {  return *ptr; }

 

   // Overloding arrow operator so that members of T can be accessed

   // like a pointer (useful if T represents a class or struct or

   // union type)

   T * operator -> () { return ptr; }

};

int main()

{

    SmartPtr<int> ptr(new int());

    *ptr = 20;

    cout << *ptr;

    return 0;

}