using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading;

using System.Threading.Tasks;

​

namespace Calculator

{

    class Program

    {

        static void Main(string[] args)

        {

            Console.WriteLine("CALCULATOR");

            Console.WriteLine("This calculator was created by Joaquin.");

            Thread.Sleep(2400);

            Console.WriteLine("If you would like the instructions press y then enter if not just press enter.");

            string response = Console.ReadLine();

            if (response == "y") 

            {

                Console.WriteLine("This calculator does basic operations,");

                Thread.Sleep(1800);

                Console.WriteLine("For example adding represented by +");

                Thread.Sleep(1500);

                Console.WriteLine("Or subtracting with -.");

                Thread.Sleep(1400);

                Console.WriteLine("Other operations include multiplying or dividing with * and / respectively.");

                Thread.Sleep(2800);

                Console.WriteLine("Squaring and cubing is done with sq as the operation or cb depending on which one.");

                Thread.Sleep(3000);

                Console.WriteLine("taking the square root of a number is done with sq rt.");

            }

            Console.WriteLine("please enter the first or only number in your calculation then press enter.");

            double firstOperand = double.Parse(Console.ReadLine());

            Console.WriteLine("now please enter your operation and then enter.");

            string operation = Console.ReadLine();

            if (operation == "sq")

            {

                Console.Write("Your answer is ");

                Thread.Sleep(500);

                double answer = firstOperand * firstOperand;

                Console.WriteLine(answer);

            }

            else if (operation == "cb")

            {

                Console.Write("Your answer is ");

                Thread.Sleep(500);

                double answer = firstOperand * firstOperand * firstOperand;

                Console.WriteLine(answer);

            }

            else if (operation == "sq rt")

            {

                Console.Write("Your answer is ");

                Thread.Sleep(500);

                double answer = Math.Sqrt(firstOperand);

                Console.WriteLine(answer);

            }

            else if (operation == "+")

            {

                Console.WriteLine("please enter your second number");

                double secondOperand = double.Parse(Console.ReadLine());

                Console.Write("Your answer is ");

                Thread.Sleep(500);

                double answer = firstOperand + secondOperand;

                Console.WriteLine(answer);

            }

            else if (operation == "-")

            {

                Console.WriteLine("please enter your second number");

                double secondOperand = double.Parse(Console.ReadLine());

                Console.Write("Your answer is ");

                Thread.Sleep(500);

                double answer = firstOperand - secondOperand;

                Console.WriteLine(answer);

            }

            else if (operation == "*")

            {

                Console.WriteLine("please enter your second number");

                double secondOperand = double.Parse(Console.ReadLine());

                Console.Write("Your answer is ");

                Thread.Sleep(500);

                double answer = firstOperand * secondOperand;

                Console.WriteLine(answer);

            }

            else if (operation == "/")

            {

                Console.WriteLine("please enter your second number");

                double secondOperand = double.Parse(Console.ReadLine());

                Console.Write("Your answer is ");

                Thread.Sleep(500);

                double answer = firstOperand / secondOperand;

                Console.WriteLine(answer);

            }

            else

            {

                Console.WriteLine("YOU USED THE CALCULATOR WRONG!");

            }

            Console.WriteLine("Please press enter");

            Console.ReadLine();

​

        }

    }

}

​