擅长:python、mysql、java
<p>尝试:</p>
<pre><code>print("type in a number")
number = input()
start_small = "".join(sorted(str(number)))
start_big = "".join(sorted(str(number), reverse=True))
subtraction = int(start_big)-int(start_small)
print(subtraction)
</code></pre>
<p>使用Python2.7。您必须使用<code>str()</code>和<code>int()</code></p>