擅长:python、mysql、java
<p>您的代码是正确的,只需打印输出,否则分配给变量并打印它:</p>
<pre><code>>>> def square(x):
... return x*x
...
>>> def twoPower(x):
... ''' x: int or float.
... '''
... return square(square(x))
...
>>>print twoPower(3.12)
94.75854336000002
</code></pre>
<p>计算功率值:</p>
^{pr2}$