类参数与构造函数参数

class Car:
    wheels = 4  # 类参数

    def __init__(self, color):
        self.color = color

    def drive(self):
        print(f"The {self.color} car is driving on {Car.wheels} wheels.")

# 使用类参数
car1 = Car("red")
car1.drive()  # 输出：The red car is driving on 4 wheels.

car2 = Car("blue")
car2.drive()  # 输出：The blue car is driving on 4 wheels.

class Car:
    def __init__(self, color, wheels):
        self.color = color
        self.wheels = wheels

    def drive(self):
        print(f"The {self.color} car is driving on {self.wheels} wheels.")

# 使用构造函数参数
car1 = Car("red", 4)
car1.drive()  # 输出：The red car is driving on 4 wheels.

car2 = Car("blue", 6)
car2.drive()  # 输出：The blue car is driving on 6 wheels.