集合之队列

using System;
using System.Collections.Generic;
using System.Text;
using System.Collections;

namespace TestConsole
{
    class Program
    {
        static void Main(string[] args)
        {
            Queue q = new Queue();

            Queue q2 = new Queue();

            foreach (int i in new int[4] { 1, 2, 3, 4 })
            {
                q.Enqueue(i);
                q2.Enqueue(i);
            }

            foreach (int i in q)
            {
                Console.WriteLine(i);
            }

            q.Dequeue();// 移除

            Console.WriteLine("出队");

            foreach (int i in q)
            {
                Console.WriteLine(i);
            }

            q2.Peek();//返回位于开始处对象但不移除
            Console.WriteLine("-------------");
            foreach (int i in q2)
            {
                Console.WriteLine(i);                 
            }

            while (q2.Count != 0)
            {
                int i = (int)q2.Dequeue();//清空
                q2.Dequeue();
            }

            Console.WriteLine("清空");

            foreach (int i in q2)
            {
                Console.WriteLine(i);
            }
        }
    }
}