CPP_SmartPtr_03.cpp

void fooFunc(){
    //We will have a count to keep track of how many pointers are pointing to the object.
    shared_ptr<Dog> p(new Dog("Gunner")); // count == 1 now

    //This is not allowed
    //shared_ptr<Dog> pt = new Dog("Smile");

    //Returns the raw pointer. 
    //In general, avoid using raw pointer when use smart pointers
    Dog* ptr = p.get(); 

    //We can dereference the smart pointer just like the raw pointer
    (*p).bark();
    //Use the shared pointer just like the raw pointer.
    p->bark();

    {
        shared_ptr<Dog> p2 = p; //count == 2
        p2->bark();
        cout << p.use_count() << endl; //Output how many pointers we have
    }
    p->bark(); //count == 1

}// count will be 0 when code executes to here, and Gunner will be deleted