107

Code

    ///Name: Conner Wygaerts
///Period: 6
///Project Name: BabyCalculator
///File Name: BabyCalculator.java
///Date Finished: 3/31/16

 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;
    			}
    
    			if ( a != 0 )
                    System.out.println(c);
    
    		} while ( a != 0 );
            System.out.println("Goodbye");
    	}
    }

Picture of the output