Assignemnt #73 and BabyCalc

Code

  /// name: Leila Ordukhani
  /// period: 6
  /// program name: Sixty-Third Program
  /// file name: BabyCalc.java
  /// date finished: 12/17/15
  
  import java.util.Scanner;

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

		double a, b, c;
		String op;

		do
		{
			System.out.print("> ");
			a  = keyboard.nextDouble();
			op = keyboard.next();
			b  = keyboard.nextDouble();

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

    		} while ( a != 0 );
            
            System.out.println("Bye, now.");
	}
}
  

Picture of the output