擅长:python、mysql、java
<p><a href="https://docs.python.org/2/library/functions.html#map" rel="nofollow">https://docs.python.org/2/library/functions.html#map</a></p>
<blockquote>
<p>map(function, iterable, ...)
Apply function to every item of iterable and return a list of the results...</p>
</blockquote>
<p><code>a</code>是可iterable的,因为<code>raw_input().split(' ')</code>是可iterable的,但是<code>a[0]</code>和<code>a[1]</code>不是。你知道吗</p>
<p>你应该<code>print a[0] / a[1]**2</code></p>
<p>正确的输入</p>
<pre><code>6
47 1.30
84 2.45
52 1.61
118 2.05
70 1.67
75 1.58
</code></pre>
<p>和代码</p>
<pre><code>for i in range(int(raw_input())):
a = map(float, raw_input().split(' '))
print a[0] / a[1]**2
</code></pre>