Zadatak 2

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Vezba_03_2017
{
    class StackLNode
    {
        public StackLNode(int content)
        {
            Content = content;
        }
        public int Content { get; set; }
        public StackLNode next { get; set; }

    }
    class StackL
    {
        private StackLNode _head;
        private int count = 0;

        public bool IsEmpty
        {
            get { return _head == null; }
        }

        public int Count { get { return count; } set { count = value; } }

        public void Push(int x)
        {
            StackLNode newNode = new StackLNode(x);
            newNode.next = _head;
            _head = newNode;
            count++;
        }

        public int Pop()
        {
            if (IsEmpty)
                throw new InvalidOperationException("The stack is empty.");
            int x = _head.Content;
            _head = _head.next;
            count--;
            return x;
        }

        public override string ToString()
        {
            StringBuilder sb = new StringBuilder();

            StackLNode node = _head;
            while (node != null)
            {
                sb.AppendFormat("{0} ", node.Content);
                node = node.next;
            }

            return sb.ToString();


        }
    }
}