Simple Calculator in C#

Objective:

Create a simple four function calculator class.

Program:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace ABC

{

    class Calculator

    {

        double addition;

        double subtraction;

        double multiplication;

       double division;

        double remainder;

        double a, b;

        char op;

        public void GetData()

        {

            Console.WriteLine("Enter first value");

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

            Console.WriteLine("Enter operator");

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

            Console.WriteLine("Enter second value");

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

        }

        public void Display()

        {

            switch (op)

            {

                case '+':

                    addition =Convert.ToDouble( a + b);

                    Console.WriteLine("Addition of {0} and {1} is {2}", a, b,addition);

                    break;

                case '-':

                    subtraction = Convert.ToDouble(a - b);

                    Console.WriteLine("subtraction of {0} and {1} is {2}", a, b,subtraction);

                    break;

                case'*':

                    multiplication = Convert.ToDouble(a * b);

                    Console.WriteLine("Multiplication of {0} and {1} is {2}",a,b,multiplication);

                    break;

                case'/':

                    division = Convert.ToDouble(a / b);

                    Console.WriteLine("Division of {0} and {1} is {2}",a,b,division);

                    break;

                case'%':

                    remainder = Convert.ToDouble(a % b);

                    Console.WriteLine("Remainder is {0}",remainder);

                    break;

                default:

                    Console.WriteLine("Invalid input");

                    break;

                                       

            }

        }

        class program

        {

            static void Main(string[] args)

            {

                Calculator p1 = new Calculator();

                p1.GetData();

                p1.Display();

            }

        }

    }

}

Output: