/**
 * Write a description of class Memory here.
 *
 * @author (your name)
 * @version (a version number or a date)
 */
public class Memory
{
    private static double mem;
    
    public Memory()
    {
        // initialise instance variables
        mem = 0;
    }

    public static double memRead() 
    {
        return mem;    
    }
    
    public static double memUpdate(double lastAns) 
    {
        return mem = lastAns;
    }
    
    public static double memClear()
    {
        return mem = 0;
    }
    
    public static void printAns(String printAnswer){
        System.out.println(printAnswer);       
    }
}