Assignemnt #73, Baby Calulator

Code

      import java.util.Scanner;
      
      public class BabyCalculator
      {
      	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 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 ( c != 0 );
      	}
      }
    

Picture of the output

Assignment 73