using System;

​

​

namespace Exception

{

    class Calc

    {

        //string calculation = Console.ReadLine();

​

        private double a;

        private double b;

​

        public double A

        {

            get { return this.a; }

            set { this.a = value; }

        }

​

        public double B

        {

            get { return this.b; }

            set { this.b = value; }

        }

​

​

        public double Division() => a / b;

​

        public double Sum() => a + b;

​

        public double Multiplication() => a * b;

​

        public double Emission() => a - b;

    }

​

​

    public class DivideByZero : System.Exception

    {

        public override string Message

        {

            get { return "Are you OK buddy ?"; }

        }

    }

​

    class Program

    {

        public static void Main()

        {

            string operand;

            double result = 0;

​

            //double zero = 0;

            //double except = 1 / zero;

​

            Calc calculator = new Calc();

            Console.WriteLine("Enter first number");

            calculator.A = double.Parse(Console.ReadLine());

​

            Console.WriteLine("What do you want to do ? Enter '+' '-' '*' '/'");

            operand = Console.ReadLine();

​

            Console.WriteLine("Enter second number");

            calculator.B = double.Parse(Console.ReadLine());

​

​

            if (operand == "+")

            {

                result = calculator.Sum();

            }

            else if (operand == "-")

            {

                result = calculator.Emission();

            }

            else if (operand == "*")

            {

                result = calculator.Multiplication();

            }

            else if (operand == "/")

            {

                try

                {

                    if (calculator.B == 0)

                    {

                        throw new DivideByZero();

                    }

                }

                catch (DivideByZero exception)

                {

                    Console.WriteLine(exception.Message);

                    Console.ReadLine();

                    Environment.Exit(0);

                }

​

                result = calculator.Division();

            }

​

​

            Console.WriteLine("{0} {1} {2} = {3}", calculator.A, operand, calculator.B, result);

        }

    }

}