擅长:python、mysql、java
<p>如果值大于<code>b</code>,则不仅需要设置新的<code>b</code>,还需要将旧的<code>b</code>移动到<code>b2</code>:</p>
<pre><code> elif a > b:
b, b2 = a, b
elif a < c:
c, c2 = a, c
elif a >= b2:
b2 = a
elif a <= c2:
c2 = a
</code></pre>
<p>其余的<code>elif</code>语句是错误的。数字必须大于<code>b2</code>或小于<code>c2</code></p>