#include <iostream>
using namespace std;
class Car {
    public: string name,color="White";
    Car() {
        cout << "Car class\n";
    }
    void displayColor() {
        cout << color << endl;
    }
};
class Volkswagen: public Car {
 
    public: string color;
    Volkswagen(string colorName) {
        color = colorName;
    }
    void displayColor() {
        cout << "The color is Volkswagen is: " << color << endl;
    };
};
class Mercedes: public Car {
    public: string color;
    Mercedes(string colorName) {
        color = colorName;
    }
    void displayColor() {
        cout << "The color is Mercedes is: " << color << endl;
    }
};
int main () {
    Car c;
    c.displayColor();
    Volkswagen v = Volkswagen("Red");
    Car * ptr1 = & v;
    v.displayColor();
    v.Car::displayColor();
    ptr1 -> displayColor();
    Mercedes m = Mercedes("Black");
    Car * ptr2 = & m;
    m.displayColor();
    m.Car::displayColor();
    ptr2 -> displayColor();
    return 0;
} //page180-181