using System;

​

namespace Calculator

{

    public class Program

    {

        public static void Main(string[] args)

        {

            char ac;

            double num1, num2;

            Console.WriteLine("Enter the Operator ( +, -, *, / )");

            ac = Console.ReadLine()[0];

            Console.WriteLine("Enter the two numbers one by one");

            num1 = Convert.ToDouble(Console.ReadLine());

            num2 = Convert.ToDouble(Console.ReadLine());

            switch( ac)

            {

                case '+':

                    Console.WriteLine("{0} + {1} = {2}",num1,num2,(num1+num2));

                    break;

                case '-':

                    Console.WriteLine("{0} - {1} = {2}",num1,num2,(num1-num2));

                    break;  

                case '*':

                    Console.WriteLine("{0} * {1} = {2}",num1,num2,(num1*num2));

                    break;  

                case '/':

                    if(num2 == 0.0)

                        Console.WriteLine("Divide by zero situation");

                    else

                        Console.WriteLine("{0} / {1} = {2}",num1,num2,(num1/num2));

                    break;

                default:

                    Console.WriteLine("{0} is an invalid operator",ac);

                    break;

            }

            Console.WriteLine("Press Any Key to Exit the Program");

            Console.ReadLine();

        }

    }

}