Assignement: Project4: A Basic Calculator

Code

 /// Name: Sean Harrison
    /// Period: 7
    /// Program name: CalcProject
    /// File Name: CalcProject.html
    /// Date Finished: 4/14/2016
    
import java.util.Scanner;

public class CalcProject
{
	public static void main( String[] args )
	{
		Scanner keyboard = new Scanner(System.in);

		double n1, n2, n3;
		String operation;

		do
		{
			System.out.print("> ");
			n1  = keyboard.nextDouble();
			operation = keyboard.next();
			n2  = keyboard.nextDouble();

			if ( operation.equals("+") )
            {
				n3 = add(n1, n2);
            }
            else if ( operation.equals("-") )
            {
                n3 = subtract(n1, n2);
            }
            else if ( operation.equals("*") )
            {
                n3 = multiply(n1, n2);
            }
            else if ( operation.equals("/") )
            {
                n3 = divide(n1, n2);
            }
            else if ( operation.equals("^") )
            {
                n3 = exponent(n1, n2);
            }
			else
			{
				System.out.println("Undefined operator: '" + operation + "'.");
				n3 = 0;
			}

			System.out.println(n3);

		} while ( n1 != 0 );
        System.out.println("Bye, now.");
	}
    
    public static double add( double n1, double n2 )
    {
        double total;
        total = n1 + n2;
        return total;
    }
    public static double subtract( double a, double b)
    {
        double total;
        total = a - b;
        return total;
    }
    public static double multiply( double n1, double n2)
    {
        double total;
        total = n1 * n2;
        return total;
    }
    public static double divide( double n1, double n2)
    {
        double total;
        total = n1 / n2;
        return total;
    }
    public static double exponent( double n1, double n2)
    {
        double total = n1;
        for ( double x = 1; x < n2; x++)
            total = total * n1;
        return total;
    }
}



            
       
 

Picture of the output