擅长:python、mysql、java
<pre><code>counterc = 0
countern = 0
counterx = 0
letter = input()
if letter in ['c','n','x']:
globals()['counter{}'.format(letter)] += 1
print(globals()['counter{}'.format(letter)])
</code></pre>
<p>以后谢谢我
如果你用的是python2,那么输入'c'就在py3上,只需输入c而不加引号。你知道吗</p>