擅长:python、mysql、java
<p>我只记得我以前问过一个关于机器人位置的类似问题。以下代码现在起作用:</p>
<pre><code>netAmount = 0
operations = ['D','D','W','D']
amount = [300,300,200,100]
i = 0
while i < (len(operations)):
if operations[i] == 'D': netAmount += amount[i]
elif operations[i] == 'W': netAmount -= amount[i]
else: pass
i += 1
</code></pre>