public class GroundVehicle extends Vehicle	// Ground vehicle is a type of Vehicle that travels on the ground using tires or tread
{											// and so is impacted by terrain and also has a limited distance of travel
	protected boolean roughTerrainCapable;	// can this type of ground vehcle make it over rough terrain?
	
	public GroundVehicle()					// no arg constructor
	{
		this("unknown");
	}
	
	public GroundVehicle(String t)
	{
		super(t);							
		roughTerrainCapable=false;			// establish values unique to GroundVehicle
		speed=50;
		armament=10;
		capacity=4;
		heavilyArmored=true;
	}

	protected int getDistance()				// getDistance based on speed and how much fuel it consumes (based on heavily armored or not)
	{
		if(heavilyArmored)
			return speed*30;
		else return speed*45;
	}

	@Override								// use parent toString and add roughTerrainCapable
	public String toString()
	{
		return super.toString() + " and is rough terrain capable " + roughTerrainCapable;
	}

	// getBattleUtility is specific to Ground Vehicle's strengths and weaknesses:  cannot traverse rough terrain unless
	// rough terrain capable, and if ground support is needed, is useful if capacity is more than 1, cannot travel a great distance
	public int getBattleUtility(boolean night, boolean roughTerrain, boolean needGroundSupport, boolean needHeavyArms, boolean antiAircraftGuns, boolean equipment, int distance)
	{
		int score;
		if(roughTerrain&&!roughTerrainCapable) score=-5;
		else score=8;
		if(needGroundSupport)score+=capacity-1;
		if(distance>getDistance()) score=score-10;
		return score;
	}	
}