using System;

​

/*

Author: Ge Yan

Date: 07/07/2020

Note: Coding Club Summer 2020, project 1

        This is a simple two number calculator with *, /, +, - operations. 

​

*/

​

namespace Calculator

{

    public class Program

    {

        public static void Main(string[] args)

        {

            // Declare variables and then initialize to zero.

            int num1 = 0; int num2 = 0;

​

            // Display title as the C# console calculator app.

            Console.WriteLine("Console Calculator in C#\r");

            Console.WriteLine("------------------------\n");

​

            // Ask the user to type the first number.

            Console.WriteLine("Type a number, and then press Enter");

            num1 = Convert.ToInt32(Console.ReadLine());

​

            // Ask the user to type the second number.

            Console.WriteLine("Type another number, and then press Enter");

            num2 = Convert.ToInt32(Console.ReadLine());

​

            // Ask the user to choose an option.

            Console.WriteLine("Choose an option from the following list:");

            Console.WriteLine("\ta - Add");

            Console.WriteLine("\ts - Subtract");

            Console.WriteLine("\tm - Multiply");

            Console.WriteLine("\td - Divide");

            Console.Write("Your option? ");

​

            // Use a switch statement to do the math.

            switch (Console.ReadLine())

            {

                case "a":

                    Console.WriteLine("Your result: {num1} + {num2} = " + (num1 + num2));

                    break;

                case "s":

                    Console.WriteLine("Your result: {num1} - {num2} = " + (num1 - num2));

                    break;

                case "m":

                    Console.WriteLine("Your result: {num1} * {num2} = " + (num1 * num2));

                    break;

                case "d":

                    Console.WriteLine("Your result: {num1} / {num2} = " + (num1 / num2));

                    break;

            }

            // Wait for the user to respond before closing.

            Console.Write("Press any key to close the Calculator console app...");

            Console.ReadLine();

        }

    }

}