一个数组，索引,泛型，迭代的例子

 迭代就是指循环，迭代器是指实现该循环的一种方式 ，也是一种设计模式。

 

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

namespace diedai2
{

    public class Stack<T> : IEnumerable<T>
    {
        //数组，索引,泛型，迭代
         T[] items;
      int idx;

       
       
        public Stack(int size)
        {

            items = new T[size];
 
        }
        public void Push(T t)
        {
            items[idx] = t; idx++;
        }

        public T Pop()
        {
            return items[--idx];
        }

        System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator()
        {
            for (int i = items.Length - 1; i >= 0; --i)
            {
                yield return items[i];
            }
        }

        public IEnumerator<T> GetEnumerator()
        {
            for (int i = items.Length - 1; i >= 0; --i)
            {
                yield return items[i];
            }
        }

    }

 

    class Program
    {
        static void Main(string[] args)
        {
            Stack<int> stack = new Stack<int>(13);
            stack.Push(100);
            stack.Push(101);
            stack.Push(103);
            stack.Push(104);
            stack.Push(105);
            stack.Push(106);
            stack.Push(107);
            stack.Push(108);
            stack.Push(109);
            stack.Push(110);
            stack.Push(111);
            stack.Push(112);
            foreach (int i in stack)
            {
                Console.WriteLine(i.ToString());
            }
            Console.Read();

        }
    }
}