public class MyCars {
    public static void main() {
        Fuel fuel = new Fuel(5);
        Car carnr1 = new Car(fuel, "Mercedes", "C65", 3.0, 320, 13);
        Car carnr2 = new Car(fuel, "Opel", "Insignia", 2.0, 160, 11);

        System.out.println(carnr1.getInfo());
        System.out.println(carnr1.fuelCost(200));

        System.out.println(carnr2.getInfo());
        System.out.println(carnr2.fuelCost(250));
    }

    public class Fuel {
        private double _cost;

        public Fuel(cost) {
            _cost = cost;
        }

        double getCost() {
            return _cost;
        }

        void changeCost(double cost) {
            _cost = cost;
        }
    }

    public class Car {
        private String carBrand;
        private String carModel;
        private double carEngine;
        private int horsePower;
        private double fuelConsumption;
	private Fuel fuel;

        public Car(Fuel fuel, String carBrand, String carModel, double carEngine, int horsePower, double fuelConsumption) {
	    this.fuel = fuel;
            this.carBrand = carBrand;
            this.carModel = carModel;
            this.carEngine = carEngine;
            this.horsePower = horsePower;
            this.fuelConsumption = fuelConsumption;
        }

        String getInfo() {
            return carBrand + " " + carModel + "; " + carEngine + "; " + horsePower + "KM" + "; " + fuelConsumption + " l/100km;";
        }

        String fuelCost(double kilometers) {
            double totalCost = fuelConsumption * (kilometers/100) * fuel.getCost();
            return "Koszt przejechania " + kilometers + " kilometrow autem " + carBrand + " " + carModel + " to " + totalCost + "zl.";
        }
    }
}