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45 lines
1.5 KiB
45 lines
1.5 KiB
/**
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* File: deque.cs
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* Created Time: 2022-12-30
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* Author: moonache (microin1301@outlook.com)
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*/
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namespace hello_algo.chapter_stack_and_queue;
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public class deque {
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[Test]
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public void Test() {
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/* 初始化双向队列 */
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// 在 C# 中，将链表 LinkedList 看作双向队列来使用
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LinkedList<int> deque = new();
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/* 元素入队 */
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deque.AddLast(2); // 添加至队尾
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deque.AddLast(5);
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deque.AddLast(4);
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deque.AddFirst(3); // 添加至队首
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deque.AddFirst(1);
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Console.WriteLine("双向队列 deque = " + string.Join(",", deque));
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/* 访问元素 */
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int? peekFirst = deque.First?.Value; // 队首元素
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Console.WriteLine("队首元素 peekFirst = " + peekFirst);
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int? peekLast = deque.Last?.Value; // 队尾元素
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Console.WriteLine("队尾元素 peekLast = " + peekLast);
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/* 元素出队 */
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deque.RemoveFirst(); // 队首元素出队
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Console.WriteLine("队首元素出队后 deque = " + string.Join(",", deque));
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deque.RemoveLast(); // 队尾元素出队
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Console.WriteLine("队尾元素出队后 deque = " + string.Join(",", deque));
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/* 获取双向队列的长度 */
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int size = deque.Count;
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Console.WriteLine("双向队列长度 size = " + size);
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/* 判断双向队列是否为空 */
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bool isEmpty = deque.Count == 0;
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Console.WriteLine("双向队列是否为空 = " + isEmpty);
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}
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}
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