Assignemnt #107 and Baby Calculator

Code

/// Name: Kyle Ivy
/// Period: 5
/// Program Name: Evenness
/// File Name: Evenness.java
/// Date Finished: 4/20/2016

  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();
                
                if ( a != 0 ){
                    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 ( a != 0 );
    	}
    }
  
    

prog107.PNG