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

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            int a, s, x, d, m, z;
            char choice;
            Console.SetCursorPosition(6, 1);
            Console.BackgroundColor = ConsoleColor.White;
            Console.ForegroundColor = ConsoleColor.Black;
            
            Console.WriteLine("*************Program Calculation********************* ");
            Console.WriteLine("a| for Add");
            Console.WriteLine("s| for Subtract");
            Console.WriteLine("x| for Multiply");
            Console.WriteLine("d| for Divide ");
            Console.WriteLine("m| for Mode  ");
            Console.WriteLine("z| for exit  ");
            Console.WriteLine("**************************************************** ");

            Console.WriteLine("Choose option =");
            choice=Convert.ToChar(Console.ReadLine());

             if (choice == 'a')
            {
             Console.WriteLine("  Add  ");
            }
            else if (choice == 's')
            {
            Console.WriteLine("  Subtract  ");
            }
            else if (choice == 'x')
            {
            Console.WriteLine("  Multiply  ");
            }
            else if (choice == 'd')
            {
            Console.WriteLine("  Divide  ");
            }
            else if (choice == 'm')
            {
            Console.WriteLine("  Mode  ");
            }
            else
            Console.WriteLine("Exit");

            //Console.ReadLine("choice");
        }
    }
}