<p>我不明白怎么了。这是我的密码:</p>
<pre><code>class CarClass(object):
def __init__(self,year_model,make):
self.__year_model=year_model
self.__make=make
self.__speed=0
def accelerate(self):
self.__speed+=5
def brake(self):
self.__speed-=5
def get_speed(self):
return self.__speed
#create car1 object
car1=CarClass(2013,'TATA')
#updates speed of car
car1.accelerate()
print('The current speeed is:')
car1.get_speed()
car1.accelerate()
car1.accelerate()
print('The current speeed is:')
car1.get_speed()
car1.accelerate()
car1.accelerate()
print('The current speeed is:')
car1.get_speed()
car1.accelerate()
car1.accelerate()
print('The current speeed is:')
car1.get_speed()
car1.accelerate()
</code></pre>
<p>下面是我的代码输出:</p>
<pre class="lang-none prettyprint-override"><code>The current speeed is:
The current speeed is:
The current speeed is:
The current speeed is:
The current speeed is:
The current speeed is:
</code></pre>
<p>它应该显示速度每增加5倍,但它不显示任何速度。我已经在这个代码上工作了一段时间了,但是没有任何进展</p>