Do-While Loops #73 (Takes two days to perfect a simple mistake)

Code

/// Name: Amir Salehi
/// Period: 7
/// Program Name:Baby Calculator
/// File Name:BabyCalculator.java
/// Date Finished: 1/6/2016

 
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 ( true );
	}
}




    

Picture(s) of the output