using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

​

namespace SimpleCalculator

{

  class Program

  {

    static void Main(string[] args)

    {

        //use for the string operation choice

        int operation = 0;

        //stock the result of the operation

        double result = 0;

​

        //Ask user first number

        Console.WriteLine("Type you first number :");

        string stringFirstNumber = Console.ReadLine();

        double firstNumber = Convert.ToDouble(stringFirstNumber);

​

        //Ask user second number

        Console.WriteLine("Type you second number :");

        string stringSecondNumber = Console.ReadLine();

        double secondNumber = Convert.ToDouble(stringSecondNumber);

​

        //Ask user operation to use

        Console.WriteLine("Enter the operation + (addition), - (soustraction), * (multiplication), / (division), ^ (exposant) or % (reste) :");

        string stringOperation = Console.ReadLine();

​

        // Convert string choice to integral

        if (stringOperation == "+" || stringOperation == "addition")

        {

            operation = 1;

        }

        else if (stringOperation == "-" || stringOperation == "soustraction")

        {

            operation = 2;

        }

        else if (stringOperation == "*" || stringOperation == "multiplication")

        {

            operation = 3;

        }

        else if (stringOperation == "/" || stringOperation == "division")

        {

            operation = 4;

        }

        else if (stringOperation == "^" || stringOperation == "exposant")

        {

            operation = 5;

        }

        else if (stringOperation == "%" || stringOperation == "reste")

        {

            operation = 6;

        }

​

        //Do someting depending on the operation choose

        switch (operation)

        {

            case 1:

                result = firstNumber + secondNumber;

                break;

​

            case 2:

                result = firstNumber - secondNumber;

                break;

​

            case 3:

                result = firstNumber * secondNumber;

                break;

​

            case 4:

                result = firstNumber / secondNumber;

                break;

​

            case 5:

                result = Math.Pow(firstNumber, secondNumber);

                break;

​

            case 6:

                result = firstNumber % secondNumber;

                break;

        }

        Console.WriteLine("\nResult of " + firstNumber + " " + stringOperation + " " + secondNumber + " = " + result + ".");

        Console.ReadKey();

    }

  }

}