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The C++ STL (Standard Template Library) implementation of a generic smart pointer. Utilizes the C++ feature of a class destructor to the automatically free dynamically allocated memory of the object to which it references.

  class Foo
     Foo(int val) : bar(val) {}
     int GetBar() const {return bar;}
     int bar;

  void print3()
    //construct fooPtr with pointer to new Foo object   
    std::auto_ptr fooPtr = new Foo(3);
    //access referenced object as if fooPtr were a regular pointer
    cout << "bar = " << fooPtr->GetBar() << endl;

    //Foo object referenced by fooPtr is automatically freed as fooPtr goes out of scope