#include <iostream>
using namespace std;

class Car {
private:
    int fuel;
public:
    void setFuel(int f) {
        fuel = f;
    }
    void drive() {
        if (fuel > 0) {
            cout << "Driving...";
            fuel--;
        } else {
            cout << "Out of fuel!";
        }
    }
};

int main() {
    Car myCar;
    myCar.setFuel(10);
    myCar.drive();
    return 0;
}