using System;

public class Program

{

    public static void Main()

    {

        string user = "useernam,e";

        string pass = "passs3orfd";

        bool check = true;

        do 

        {

            Console.WriteLine("Please enter your Username");

            string EUser = Console.ReadLine();

            Console.WriteLine("Please enter your Password");

            string EPass = Console.ReadLine();

            if((user==EUser)&&(pass==EPass))

            {

                Console.WriteLine("Welcome "+user+" =].");

                check=false;

            }

            else

            {

                Console.Clear();

                Console.WriteLine("You have Entered the wrong password or username");

            }

        }

        while(check==true);

        double num1 = 0;

        double num2 = 0;

        char symbolic = '+';

        check = true;

        Console.WriteLine("Please enter a number (it may be a decimal)");

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

        Console.WriteLine("Please enter another number (it may be a decimal)");

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

        do

        {

            Console.WriteLine("Please enter what operation you would like to use ()");

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

        }

        while(check==true);

        Calc(num1, num2, symbolic);

    }

    //2 doubles + char

    public static double Calc(double num1, double num2, char symbolic)

    {

    }

}