Belov_HW_CS5

using System;

namespace classwork
{
    class MyStack
    {
        private int[] array;
        private int index;
        public MyStack(int size = 64)
        {
            array = new int[size];
            index = 0;
        }
        public bool isOverflow()
        {
            return array.Length == index;
        }
        public bool isEmpty()
        {
            return index == 0;
        }
        public int Size
        {
            get
            {
                return index;
            }
        }
        public int MaxSize
        {
            get
            {
                return array.Length;
            }
        }
        public void MaxCount(out int count)
        {
            count = 0;
            int max = array[0];
            for (int i = 0; i < index; i++)
            {
                if (max < array[i])
                {
                    max = array[i];
                    count = 1;
                }
                else if (max == array[i])
                    count++;
            }
        }
        public void MinCount(out int count)
        {
            count = 0;
            int min = array[0];
            for (int i = 0; i < index; i++)
            {
                if (min > array[i])
                {
                    min = array[i];
                    count = 1;
                }
                else if (min == array[i])
                    count++;
            }
        }
        public void PushBack(params int[] values)
        {
            for (int i = 0; i < values.Length && index != array.Length; i++)
                array[index++] = values[i];
        }
        public int? PopBack()
        {
            if (index != 0)
                return array[--index];
            return null;
        }
        public int[] PopBack(int count) // извлечение элементов по номерам противоречит идеологии стека
        {
            int trueSize = 0;
            int[] result = new int[count];
            for (int i = 0; i < count && index != 0; i++)
            {
                result[i] = array[--index];
                trueSize++;
            }
            Array.Resize(ref result, trueSize);
            return result;
        }
    }
}