擅长:python、mysql、java
<p>它叫做<a href="https://docs.python.org/3.5/library/functions.html#round" rel="nofollow">^{<cd1>}</a>:</p>
<pre><code>print(round(12.3))
print(round(14.5))
print(round(15.8))
</code></pre>
<p>不过,是<a href="https://en.wikipedia.org/wiki/Rounding#Round_half_to_even" rel="nofollow">rounds to even numbers on ^{<cd2>}</a>。在</p>