public class TestCar {
    public static void main(String[] args) {
        // 创建3个Car对象
        Car car1 = new Car("京A12345", "特斯拉", "Model 3", 280.0);
        Car car2 = new Car("沪B67890", "比亚迪", "汉EV");
        Car car3 = new Car("粤C24680", "丰田", "凯美瑞", 220.0);

        // 输出车辆信息
        System.out.println("=== 所有车辆信息 ===");
        car1.displayInfo();
        car2.displayInfo();
        car3.displayInfo();
        System.out.println("总车辆数：" + Car.getTotalCars());

        // 测试租车/还车
        System.out.println("\n=== 测试租车/还车 ===");
        car1.rentCar();
        car1.rentCar();
        car1.returnCar();
        car1.returnCar();

        // 测试租金计算
        System.out.println("\n=== 测试租金计算 ===");
        double rent = car2.calculateRent(5);
        System.out.println("租用5天总租金：" + rent + "元");

        // 测试日租金校验
        System.out.println("\n=== 测试日租金校验 ===");
        car3.setDailyRent(-100.0); // 改为double类型字面量
        System.out.println("修改后日租金：" + car3.getDailyRent());
    }
}