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Linked List Queue

category Programming/C# 2018. 11. 5. 22:39


using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
 
namespace Queue
{
    class Node
    {
        public int data;
        public Node next;
        public Node(int x)
        {
            data = x;
            next = null;
        }
    }
 
    class Queue
    {
        Node _front;
        Node _rear;
 
        public Queue()
        {
            _front = null;
            _rear = null;
        }
 
        public void add(int number)
        {
            if(_rear == null)
            {
                _rear = new Node(number);
                _front = _rear;
            }
            else
            {
                Node p = new Node(number);
                _rear.next = p;
                _rear = p;
            }
        }
 
        private void emptyError()
        {
            Console.WriteLine("Empty");
            Environment.Exit(-1);
        }
 
        public int remove()
        {
            if (_front == null) emptyError();
            int x = _front.data;
            _front = _front.next;
            return x;
        }
 
        public void print()
        {
            Node p;
            p = _front;
 
            while(p != null)
            {
                Console.Write(p.data + "");
                p = p.next;
                Console.WriteLine();
            }
        }
    }
 
    class Program
    {
        static void Main(string[] args)
        {
            Queue q = new Queue();
 
            q.add(10);
            q.add(20);
            q.add(30);
            q.remove();
            q.add(40); q.add(50);
            q.add(60); q.add(70);
            q.remove();
            
            q.print();
        }
    }
}
 
cs






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