class MyIntArray
    {
        PRivate int[] arr;
        private int upper; //最大索引
        private int index; //當(dāng)前索引
        public MyIntArray(int size)
        {
            arr = new int[size];
            upper = size - 1;
            index = 0;
        }
        public int Length
        {
            get { return upper + 1; }
        }
        public void Insert(int ele)
        {
            arr[index] = ele;
            index++;
        }
        public void Display()
        {
            for (int i = 0; i <= upper; i++)
            {
                Console.Write(arr[i] + " ");
            }
        }
        public void Clear()
        {
            for (int i = 0; i <= upper; i++)
            {
                arr[i] = 0;
            }
            index = 0;
        }
        //冒泡排序：從最后一個(gè)索引開(kāi)始倒數(shù)
        public void BubbleSort()
        {
            int temp;
            //從最大的索引開(kāi)始往前遍歷，直到索引為1的位置
            for (int i = upper; i >= 1; i--)