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krahets
2023-12-14 02:53:40 +08:00
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chapter_stack_and_queue/summary/index.html
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@@ -3532,7 +3532,7 @@
</div>
<div class="admonition question">
<p class="admonition-title">撤销（undo）和反撤销（redo）具体是如何实现的？</p>
<p>使用两个堆栈，栈 <code>A</code> 用于撤销，栈 <code>B</code> 用于反撤销。</p>
<p>使用两个栈，栈 <code>A</code> 用于撤销，栈 <code>B</code> 用于反撤销。</p>
<ol>
<li>每当用户执行一个操作，将这个操作压入栈 <code>A</code> ，并清空栈 <code>B</code> 。</li>
<li>当用户执行“撤销”时，从栈 <code>A</code> 中弹出最近的操作，并将其压入栈 <code>B</code> 。</li>