C# 中的 Queue.Dequeue 方法
C# 中的 Queue.Dequeue() 方法用于删除队列开头位置的对象并返回该对象。
语法
语法如下 −
public virtual object Dequeue ();
实例
现在,让我们来看一个实例 −
using System; using System.Collections.Generic; public class Demo { public static void Main() { Queue<string> queue = new Queue<string>(); queue.Enqueue("A"); queue.Enqueue("B"); queue.Enqueue("C"); queue.Enqueue("D"); queue.Enqueue("E"); queue.Enqueue("F"); queue.Enqueue("G"); Console.WriteLine("Count of elements = "+queue.Count); Console.WriteLine("Element at the beginning of queue = " + queue.Peek()); queue.Dequeue(); queue.Dequeue(); queue.Dequeue(); Console.WriteLine("Count of elements = "+queue.Count); } }
输出
这将产生以下输出 −
Count of elements = 7 Element at the beginning of queue = A Count of elements = 4
实例
现在,让我们来看另一个实例 −
using System; using System.Collections.Generic; public class Demo { public static void Main() { Queue<string> queue = new Queue<string>(); queue.Enqueue("Gary"); queue.Enqueue("Jack"); queue.Enqueue("Ryan"); queue.Enqueue("Kevin"); queue.Enqueue("Mark"); queue.Enqueue("Jack"); queue.Enqueue("Ryan"); queue.Enqueue("Kevin"); Console.Write("Count of elements = "); Console.WriteLine(queue.Count); Console.WriteLine("Queue..."); foreach(string i in queue) { Console.WriteLine(i); } queue.Dequeue(); queue.Dequeue(); Console.WriteLine("Queue...UPDATED"); foreach(string i in queue) { Console.WriteLine(i); } Console.Write("Count of elements (updated) = "+queue.Count); queue.Clear(); Console.Write("
Count of elements (updated AGAIN) = "); Console.WriteLine(queue.Count); } }
输出
这将产生以下输出 −
Count of elements = 8 Queue... Gary Jack Ryan Kevin Mark Jack Ryan Kevin Queue...UPDATED Ryan Kevin Mark Jack Ryan Kevin Count of elements (updated) = 6 Count of elements (updated AGAIN) = 0
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