'''
CSCI 204 class exercise on inheritance
Truck class
The Truck class inherits from the Vehicle class
'''
from vehicle import Vehicle

class Truck(Vehicle):
    
    def __init__(self, vin, fuel_cap, load_cap, num_axles):
        super().__init__(vin, fuel_cap, load_cap)
        self._num_axles = num_axles

    def __str__(self):
        s = super().__str__()
        s += 'Num axles : ' + str(self._num_axles) + '\n'
        return s