using System;using System.Collections;using System.Collections.Generic;using System.Collections.Specialized;using System.Diagnostics;using System.IO;using System.Linq;using System.Runtime.InteropServices;using System.Text;using System.Threading.Tasks;using System.Runtime.Serialization.Formatters.Binary;using System.Threading;namespace ConsoleApp1{ class Program { static void Main(string[] args) { Queue<int> q = new Queue<int>(); q.Enqueue(100); //push q.Enqueue(120); q.Enqueue(130); q.Peek(); // front int next = q.Dequeue();//100 // pop 개꿀인게 return형이 있어 c++보다 편함 next = q.Dequeue();//120 } }}