using System; //

/*

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.)

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 " num?

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.

*/

public class Program

{

public static void Main()

{

string firstname;

int number1;

int number2;

int sum;

int product;

int difference;

Console.WriteLine(" Input your first name ");

firstname = Console.ReadLine();

Console. WriteLine(firstname + " Please input a number between 0 to 9 ");

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

if( number1 > 10)

{ number1 = 5;}

else if (number1 < 0)

{number1 = 5;}

Console.WriteLine(firstname + " Your number is " + number1 );

Console.WriteLine(firstname + " Please input a number between 0 to 10");

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

if ( number2 > 10)

{ number2 = 5;}

else if (number2 < 0)

{number2 = 5;}

Console. WriteLine( "Your number is " + number2 );

sum = number1 + number2;

Console.WriteLine( " Your sum for" + number1 + "+" + number2 + "=" + sum );

Console.WriteLine();

product = number1 * number2;

Console.WriteLine("Your product for" + number1 + "*" + number2 + "=" + product );

Console.WriteLine();

difference = number1 - number2;

Console.WriteLine( " Your difference for " + number1 + "-" + number2 + "=" + difference );

Console.WriteLine();

Console.WriteLine (firstname + " Thank you for using your basic calculator" );

}

}

​