实现简单的汽车租赁系统

好的，一个简单的汽车租赁系统可以包含以下基本功能：

1. 添加车辆：管理员可以添加新的车辆信息，包括车牌号、品牌、型号、年份、租金等。
2. 查看车辆：用户可以查看可租用的车辆信息，包括车牌号、品牌、型号、年份、租金等。
3. 租车：用户可以选择租用可用的车辆，并填写租车时间和归还时间。
4. 还车：用户归还车辆，并根据实际使用时间计算租金。
5. 管理员操作：管理员可以编辑和删除车辆信息。

下面是一个简单的 Python 示例代码：

class Car:
    def __init__(self, license_plate, brand, model, year, rental_rate):
        self.license_plate = license_plate
        self.brand = brand
        self.model = model
        self.year = year
        self.rental_rate = rental_rate

class RentalSystem:
    
    def __init__(self):
        self.cars = []
        self.rented_cars = []
        
    def add_car(self, car):
        self.cars.append(car)
        print(f"Car {car.license_plate} is added to the system.")

    def view_cars(self):
        print("Available cars:")
        for car in self.cars:
            print(f"{car.license_plate} - {car.brand} {car.model} ({car.year}) - Rental rate: {car.rental_rate}")
    
    def rent_car(self, license_plate, start_date, end_date):
        for car in self.cars:
            if car.license_plate == license_plate:
                self.cars.remove(car)
                self.rented_cars.append((car, start_date, end_date))
                print(f"{car.brand} {car.model} ({car.year}) with license plate {car.license_plate} is rented from {start_date} to {end_date}.")
                return
        print(f"Car with license plate {license_plate} is not available.")
        
    def return_car(self, license_plate, return_date):
        for rented_car in self.rented_cars:
            if rented_car[0].license_plate == license_plate:
                rental_time = (return_date - rented_car[1]).days
                rental_rate = rented_car[0].rental_rate
                rental_cost = rental_time * rental_rate
                self.rented_cars.remove(rented_car)
                self.cars.append(rented_car[0])
                print(f"{rented_car[0].brand} {rented_car[0].model} ({rented_car[0].year}) with license plate {rented_car[0].license_plate} is returned on {return_date}. Rental cost: {rental_cost}.")
                return
        print(f"Car with license plate {license_plate} is not rented.")
    
    def edit_car(self, license_plate, brand, model, year, rental_rate):
        for car in self.cars:
            if car.license_plate == license_plate:
                car.brand = brand
                car.model = model
                car.year = year
                car.rental_rate = rental_rate
                print(f"Car {car.license_plate} is updated.")
                return
        print(f"Car with license plate {license_plate} is not available.")
    
    def delete_car(self, license_plate):
        for car in self.cars:
            if car.license_plate == license_plate:
                self.cars.remove(car)
                print(f"Car {car.license_plate} is deleted from the system.")
                return
        print(f"Car with license plate {license_plate} is not available.")

这个示例代码中，我们定义了一个 `Car` 类，它包含车辆的基本信息。然后我们定义了 `RentalSystem` 类，包含了汽车租赁系统的各种功能，例如添加车辆、查看车辆、租车、还车、编辑车辆和删除车辆等。可以根据具体需求进行修改和扩展。