// http://stackoverflow.com/questions/670734/c-pointer-to-class-data-member

class Car
{
    public:
    int speed;
    int fuel;
};

int main()
{
    int Car::*ptr = &Car::speed;

    Car c1;
    c1.speed = 1;       // direct access
    cout << "speed is " << c1.speed << endl;
    c1.*ptr = 2;     // access via pointer to member
    cout << "speed is " << c1.speed << endl;

    ptr = &Car::fuel;
    Car c2;
    c2.fuel = 100;
    c2.speed = 20;
    cout << "speed is " << c2.speed << endl; // direct access
    cout << "speed is " << c2.*ptr << endl; // access via pointer
    system("pause");

    int *iptr;
    iptr = &(c1.speed);

    return 0;
}