using System;

​

public class MyStack

{

    int[] arr = new int[5];

    int top = -1;

    public void Push()

    {

        if (top == 4)

        {

            Console.WriteLine("Stack Overflow");

        }

        else

        {

            Console.Write("Enter a number : ");

            top++;

            arr[top] = Convert.ToInt32(Console.ReadLine());

            Console.Write("Stack after adding the current number is : ");

            for (int i = 0; i <= top; i++)

            {

                Console.Write(arr[i] + ",");

            }

​

            Console.WriteLine();

        }

    }

​

    public int Pop()

    {

        if (top == -1)

        {

            Console.WriteLine("Stack underflow");

        }

        else

        {

            Console.WriteLine("Element removed is : " + arr[top]);

            top--;

        }

​

        return 0;

    }

​

    public void PrintStack()

    {

        if (top == -1)

        {

            Console.WriteLine("No element to display");

        }

        else

        {

            Console.Write("Stack is : ");

            for (int i = 0; i <= top; i++)

            {

                Console.Write(arr[i] + ",");

            }

​

            Console.WriteLine();

        }

    }

​

    public static void Main()

    {

        MyStack S = new MyStack();

        char conty = 'y';

        do

        {

            Console.WriteLine("Menu:\n 1) Add an element to stack\n 2) Remove an element from stack\n 3) Print stack\n 4) Exit");

            int option = Convert.ToInt32(Console.ReadLine());

            switch (option)

            {

                case 1:

                    S.Push();

                    break;

                case 2:

                    S.Pop();

                    break;

                case 3:

                    S.PrintStack();

                    break;

                case 4:

                    System.Environment.Exit(0);

                    break;

                default:

                    Console.WriteLine("Wrong chice. Do you want to continue ?");

                    conty = Convert.ToChar(Console.ReadLine());

                    break;

            }

        }

        while (conty == 'Y' || conty == 'y');

    }

}