using System;

public class Program

{

    public static void Main()

    {

        /*

            Requirments

                #1. the calc must have the funcitons of: Add,Subtract,Multiply,Divide

                #2. must use code using methods, variables, and use passed in values(parameters) for the methods you define.

                #3. I must be able to go into your code and be able to use my own two numbers.

                #4. The methods must return the proper data type.

        */

        Console.WriteLine("Please enter two numbers to add");

        double Add1 = double.Parse(Console.ReadLine());

        double Add2 = double.Parse(Console.ReadLine());

        Console.WriteLine(Add1+" + "+Add2+" = "+Add(Add1,Add2));

        Console.WriteLine(" ");

        Console.WriteLine("Please enter two numbers to subtract");

        double Sub1 = double.Parse(Console.ReadLine());

        double Sub2 = double.Parse(Console.ReadLine());

        Console.WriteLine(Sub1+" - "+Sub2+" = "+Sub(Sub1,Sub2));

        Console.WriteLine(" ");

        Console.WriteLine("Please enter two numbers to Divide");

        double Div1 = double.Parse(Console.ReadLine());

        double Div2 = double.Parse(Console.ReadLine());

        Console.WriteLine(Div1+" / "+Div2+" = "+Div(Div1,Div2));

        Console.WriteLine(" ");

        Console.WriteLine("Please enter two numbers to Multiply");

        double Mult1 = double.Parse(Console.ReadLine());

        double Mult2 = double.Parse(Console.ReadLine());

        Console.WriteLine(Mult1+" * "+Mult2+" = "+Mult(Mult1,Mult2));

    }

    // This method adds two numbers together

    static double Add(double x, double y)

    {

        double sum = x + y;

        return sum;

    }

    //This method subtracts two numbers

    static double Sub(double x, double y)

    {

        double dif = x - y;

        return dif;

    }

    //This method divideds two numbers

    static double Div(double x, double y)

    {

        double dividend = (x / y);

        return dividend;

    }

    //This method Multiplys two numbers.

    static double Mult(double x, double y)

    {

        double product = (x * y);

        return product;

    }

}