public class Lettre extends Courrier
{
	private boolean urgent;

	public Lettre(boolean u)
	{
		super(1.0);
		urgent = u;
	}

	public Lettre()
	{
		this(false);
	}

	public double affranchir()
	{
		if (urgent)
			return 0.8;
		else
			return 0.5;
	}

	public String toString()
	{
		if (urgent) return "Lettre urgente";
		else return "Lettre ordinaire";
	}
}