在汽车上申请不同的折扣

Question

我刚接触java编程我需要帮助打印出折扣后的汽车价格。目前显示折扣金额。

public class carApplication {

    public static void main(String[] args) {


        Car car1 = new Car("Toyota", "2012", 13500.00);
        Car car2 = new Car("Audi", "2011", 12000.00);

        System.out.printf("Car 1 Model: %s; Car year: %s; Car Price: %.2f\n",
                car1.getModel(), car1.getYear(), car1.getcarPrice());

        System.out.printf("Car 1 Model: %s; Car year: %s; Car Price: %.2f\n",
                car2.getModel(), car2.getYear(), car2.getcarPrice());

        System.out.println("Car Price after applying discount");
        car1.setcarPrice(car1.getcarPrice()*(0.05));
        car2.setcarPrice(car2.getcarPrice()*(0.07));

        System.out.printf("Car 1 Model: %s; Car year: %s; Car Price: %.2f\n",
                car1.getModel(), car1.getYear(), car1.getcarPrice());

        System.out.printf("Car 1 Model: %s; Car year: %s; Car Price: %.2f\n",
                car2.getModel(), car2.getYear(), car2.getcarPrice());
    }
}

Answer 1

@Mkreegs是对的，你应该写

car1.setcarPrice(car1.getcarPrice()*(1 - 0.05));
car2.setcarPrice(car2.getcarPrice()*(1 - 0.07));

或通俗易懂：

car1.setcarPrice(car1.getcarPrice()*(0.95));
car2.setcarPrice(car2.getcarPrice()*(0.93));