/* program name: 2ndprogram

This program will ask the user for the first name.

Then asks the user to enter a number from 0 to 9. (check to make sure.)

if the user entered an incorrect number use the number 5.

Then asks the user to enter another number from 0 to 9. (check to make sure.)

if the user entered an incorrect number use the number 5.

add the two numbers together and provide an output to the user for the sum. (sum = num1 + num2)

multiply the two numbers together and provide the output to the user for the product. (product = num1 * num2)

subtract the first number from the second number and provide the user with the difference. (difference = num1 - num2)

Thank the user for using your basic calculator. */

using System;

​

namespace Second_Program

{

    public class Program

    {

        public static void Main()

        {

            string first_name;

            float number1;

            float number2;

            Console.WriteLine("Input First Name");

            first_name = Console.ReadLine();

            Console.WriteLine("Input Number 1");

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

            if (number1 > 10)

            {

                Console.WriteLine("This number is too big!");

                System.Environment.Exit(0);

            }

            else if (number1 < 0)

            {

                Console.WriteLine("This number is too small!");

                System.Environment.Exit(0);

            }

​

            Console.WriteLine("Input Number 2");

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

            if (number2 > 10)

            {

                Console.WriteLine("This number is too big!");

                System.Environment.Exit(0);

            }

            else if (number2 < 0)

            {

                Console.WriteLine("This number is too small!");

                System.Environment.Exit(0);

            }

​

            if (number2 > 0)

            {

                Console.WriteLine("Addition (Sum)= " + (number1 + number2).ToString());

                Console.WriteLine("Multiplication (Product)= " + (number1 * number2).ToString());

                Console.WriteLine("Subtraction (Difference)= " + (number1 - number2).ToString());

                Console.WriteLine("Division (Dividing)= " + (number1 / number2).ToString());

                Console.WriteLine("Thanks for using this basic calculator");

            }

        }

    }

}