Assignment 107, Baby Calc Review

Code

   ///Name: Stella Koliavas
   ///Period: 5
   ///Program Name:  Baby Calc 2
   ///File Name: BabyCalc2.java
   ///Date Finshed: 5/3/16
   
  import java.util.Scanner;

   public class BabyCalc2
   {
   public static void main( String[] args )
   {
		Scanner siri = new Scanner(System.in);

		double a, b, c;
		String op;
        
        
		do
		{
			System.out.print("> ");
            System.out.print("First number: ");
			a  = siri.nextDouble();
            if (a == 0)
            System.out.println("Thanks for calculating!");
            
            else if (a != 0)
            {
            System.out.print("  Divide (/), mulitiple (*), add (+), or subtract (-)? ");
			op = siri.next();
            System.out.print("  Second number: ");
			b  = siri.nextDouble();

            if (op.equals("+"))
				c = (a + b);
            else if (op.equals("-"))
                c = (a - b);
            else if (op.equals("/"))
                c = (a/b);
            else if (op.equals("*"))
                c = (a*b);
			else
			{
				System.out.println("Undefined operator: '" + op + "'.");
				c = 0;
			}

			System.out.println("  "+c+" ");

		}} while ( a != 0 );
		}
		}






        
        
        
    

Picture of the output