Making list of objects of class with function overloading - c++

Question

I am having a class Car, now I want to make linked list of Car objects. So for this I am having a Node class to hold data for each node.
class StringOfCar;
class Node
{
private:
Node* next;
Car* data;
Node ()
{
next = 0;
data = 0;
}
public:
friend class StringOfCar;
};
And StringOfCar
class StringOfCar
{
private:
Node* head;
Node* tail;
public:
StringOfCar(){
head=0;
tail=0;
}
void output();
void push (Car &);
};
Now I push the elements without any problem with this function :
void StringOfCar::push(Car & new_car)
{
Car *currentCarPtr;
Node *currentNodePtr;
currentNodePtr = new Node;
currentCarPtr = new Car(new_car);
currentNodePtr->next = 0;
currentNodePtr->data = &new_car;
if (head == 0)
{
head = currentNodePtr;
tail = currentNodePtr;
}
else
{
tail->next = currentNodePtr;
tail = currentNodePtr;
}
}
But when I try to output, program stops abruptly.I have output() for Car class also. Output function for both class is as follow :
void StringOfCar::output(){
Node * currentNodePtr = head;
if (head == 0)
cout << "NO cars \n";
else
{
while (currentNodePtr != 0)
{
currentNodePtr->data->output();
currentNodePtr = (currentNodePtr->next);
}
}
}
And for Car class :
void Car::output()
{
cout<<"\nreportingMark "<<setw(3)<<reportingMark;
cout<<"\ncarNumber "<< setw(8)<< carNumber;
cout<<"\nkind " << setw(13)<<KIND_ARRAY[kind];
if (loaded==true)
{
cout<<" \nloaded true";
}
else if (loaded == false)
{
cout<< "\nloaded false";
}
cout<< "\ndestination "<<setw(7)<<destination<<endl;
}
When I comment currentNodePtr->data->output(); this line, it works fine. What can be problem ? Please help

Answer 1

I think the problem is in this line:
currentNodePtr->data = &new_car;
of the function void StringOfCar::push(Car & new_car).
That should be
currentNodePtr->data = currentCarPtr;