package class5_3_HalfExam2_Problem1Speakers_start;// Dr. Yoder. MSOE. 20 March 2017

public abstract class Vehicle {
    public static final int DEFAULT_NORTH_METERS_PER_SEC = 4;

    /** The car's position */
    private double northMeters;

    public Vehicle() {
        this.northMeters = 0;
    }

    /**
     * Step forward the simulation by one second.
     */
    public void step() {
        northMeters += DEFAULT_NORTH_METERS_PER_SEC;
    }

    /**
     * Describe the car and its location
     * Child classes can use finishDescription() for the standard stuff.
     * @return a string representation of the object.
     */
    public abstract String toString();

    /*
     * @return a string, not starting with space, which starts
     * "at ..." and which describes the car and its positoin
     */
    protected String finishDescription() {
        return "at "+northMeters+" meters north";
    }
}