使⽤泛型和索引器实现集合类MyLis

using System;

namespace _01_调试和错误排查
{
    class MyList<T>
    {
        private T[] data = new T[4];
        private int count = 0;

        //索引器
        public T this[int index]
        {
            get
            {
                if (index < 0 || index >= count)
                {
                    throw new ArgumentOutOfRangeException("索引参数超出范围");
                }
                return data[index];
            }
            set
            {
                data[index] = value;
            }
        }

        //获取容量
        public int Capacity
        {
            get
            {
                return data.Length;
            }
        }

        //获取长度
        public int Count
        {
            get
            {
                return count;
            }
        }

        //添加元数
        public void Add(T value)
        {
            if (data.Length <= 0)
            {
                data = new T[4];
            }
            if (data.Length == count)
            {
                T[] _arr = new T[count * 2];
                for (int i = 0; i < data.Length; i++)
                {
                    _arr[i] = data[i];
                }
                data = _arr;
            }
            data[count] = value;
            count++;
        }

        //插入
        public void insert(int index, T item)
        {
            if (index < 0 || index > count)
            {
                throw new ArgumentOutOfRangeException("索引参数超出范围");
            }
            for (int i = count - 1; i > index - 1; i--)
            {
                data[i + 1] = data[i];
            }
            data[index] = item;
            count++;
        }

        //移除元素
        public void RemoveAt(int index)
        {
            if (index < 0 || index > count)
            {
                throw new ArgumentOutOfRangeException("索引参数超出范围");
            }
            for (int i = index; i < count; i++)
            {
                data[i] = data[i + 1];
            }
            count--;
        }

        //从前往后查找元素索引
        public int IndexOf(T item)
        {
            int temp = -1;
            for (int i = 0; i < count; i++)
            {
                if (item.Equals(data[i]))
                {
                    temp = i;
                    break;
                }
            }
            return temp;
        }

        //从后往前查找元素索引
        public int LastIndexOf(T item)
        {
            int temp = -1;
            for (int i = count - 1; i >= 0; i--)
            {
                if (item.Equals(data[i]))
                {
                    temp = i;
                    break;
                }
            }
            return temp;
        }

        //排序
        public void Sort()
        {
            Array.Sort(data, 0, count);
        }
    }

    public class Test
    {
        static void Main()
        {
            MyList<int> myList = new MyList<int>();

            //测试
            myList.Add(11);
            myList.Add(2);
            myList.Add(32);
            myList.Add(14);
            myList.Add(43);
            myList.Add(11);
            myList.Add(6);
            myList.Add(57);
            myList.Add(81);
            myList.Add(9);
            myList.Add(100);
            myList[2] = 1;
            myList.insert(2, 24);
            myList.RemoveAt(7);
            Console.WriteLine(myList.IndexOf(11));
            Console.WriteLine(myList.LastIndexOf(11));
            Console.WriteLine("容量" + myList.Capacity);
            Console.WriteLine("长度" + myList.Count);

            for (int i = 0; i < myList.Count; i++)
            {
                Console.Write(myList[i] + " ");
            }
            myList.Sort();
            Console.WriteLine();
            for (int i = 0; i < myList.Count; i++)
            {
                Console.Write(myList[i] + " ");
            }
        }
    }
}