现实生活中，机动车一般有两种作用，一种是载人，一种是载物，可以看做是两种运行方法。设计程序模拟客车和货车的运行，反映出客车载人 数和货车载人数 (1） 定义车类Car，包括属性名name,以及运行 方法run 2)定义客车类TaxiCar,包括属性名name,载人属性 person num,以及运行方法run0. (3)定义货车类FreightCar,包括属性名name,载货 属性goods_wight,以及运行方法run0. (④创建客车类和货车类的实例，并调用运行方法

以下是Python3的代码实现：

class Car:
    def __init__(self, name):
        self.name = name

    def run(self):
        print(f"{self.name} is running.")

class TaxiCar(Car):
    def __init__(self, name, person_num):
        super().__init__(name)
        self.person_num = person_num

    def run(self):
        print(f"{self.name} is carrying {self.person_num} passengers and running.")

class FreightCar(Car):
    def __init__(self, name, goods_weight):
        super().__init__(name)
        self.goods_weight = goods_weight

    def run(self):
        print(f"{self.name} is carrying {self.goods_weight} tons of goods and running.")

taxi_car = TaxiCar("Taxi", 4)
taxi_car.run()

freight_car = FreightCar("Freight", 10)
freight_car.run()

输出：

Taxi is carrying 4 passengers and running.
Freight is carrying 10 tons of goods and running.