using System;

​

namespace advancedcalculator

{

public class Program

{

    public static void Main()

    {

        string firstName;

        int number1;

        int number2;

        string select;

        int sum;

        int difference;

        int product;

        int quotient;

        int remainder;

        float n1;

        float n2;

        float quotient1;

        Console.WriteLine(" Please input your first name: ");

        firstName = Console.ReadLine();

        for (int i = 1; i <= 5; i++)

        {

            Console.Clear();

            Console.WriteLine(" I am in part " + i + " of the loop. ");

            Console.WriteLine(firstName + " please enter a number: ");

            number1 = int.Parse(Console.ReadLine());

            Console.WriteLine(firstName + " please enter a second number: ");

            number2 = int.Parse(Console.ReadLine());

            Console.WriteLine(firstName + " please enter an operation for me to do ( add, subtract, multiply, divide ) ");

            select = Console.ReadLine();

            switch (select.ToLower())

            {

                case "add":

                    sum = number1 + number2;

                    Console.WriteLine(firstName + " the sum of " + number1 + " and " + number2 + " is equal to " + sum);

                    Console.ReadLine();

                    break;

                case "subtract":

                    difference = number1 - number2;

                    Console.WriteLine(firstName + " the difference between " + number1 + " and " + number2 + " is equal to " + difference);

                    Console.ReadLine();

                    break;

                case "multiply":

                    product = number1 * number2;

                    Console.WriteLine(firstName + " the product of " + number1 + " and " + number2 + " is equal to " + product);

                    Console.ReadLine();

                    break;

                case "divide":

                    quotient = number1 / number2;

                    remainder = number1 % number2;

                    n1 = number1;

                    n2= number2;

                    quotient1 = n1 / n2;

                    Console.WriteLine(number1 + " / " + number2 + " = " + quotient1);

                    Console.WriteLine(firstName + " the quotient is " + quotient + " and the remainder is " + remainder + " !!! " );

                    Console.ReadLine();

                    break;

                default:

                    Console.WriteLine( "I didn't understand your word!" );

                    i = i - 1;

                    break;

            }

        }

    }

}

}