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

namespace 集合_销存管理系统
{
    public class Goods
    {
        public string Code;  //编号
        public string Name;
        public Goods(string code,string name)   //定义构造函数，赋初始值
        {
            this.Code = code;
            this.Name = name;
        }
    }

    public class JHClass : IEnumerable, IEnumerator  //定义集合类
    {
        private Goods[] _goods;  //初始化Goods类型的集合
        public JHClass(Goods[] gArray)  //使用带参构造函数赋值
        {
            _goods = new Goods[gArray.Length];
            for (int i=0;i<gArray.Length;i++)
            {
                _goods[i] = gArray[i];
            }
        }
        // 实现IEnumerable接口中的GetEnumerator方法
        IEnumerator IEnumerable.GetEnumerator()
        {
            return (IEnumerator)this;
        }

        int position = -1;  //记录索引位置
        object IEnumerator.Current
        {
            get
            {
                return _goods[position];
            }
        }

        public bool MoveNext()  //实现IEnumberator中的MoveNext方法
        {
            position++;
            return (position < _goods.Length);
        }

        //实现IENumberator中的Reset方法
        public void Reset()
        {
            position = -1;  //指向第一个元素
        }

        void IEnumerator.Reset()
        {
            throw new NotImplementedException();
        }
    }
    
    class Program
    {
        static void Main(string[] args)
        {
            Goods[] goodsArray = new Goods[3] 
            {
            new Goods("T0001","笔记本电脑"),
            new Goods("T0001","华为荣耀4X"),
            new Goods("T0003","iPad平板电脑"),
            };  //初始化Goods数组
            JHClass jhList = new JHClass(goodsArray);  //使用数组创建集合类对象
            //遍历集合
            foreach (Goods g in jhList)
            {
                Console.WriteLine(g.Code+" "+g.Name);
            }
            Console.ReadLine();
        }
    }
}