module calcul{

  typedef double Positif ;

	exception DivParZero{double n;};
		

	interface Calculette{
		void initialiser();
		double addition(in double n);
	        double soustraction(in double n);
		double multiplication(in double n);
		double division(in double n) raises (DivParZero);
		double etat();
	};
} ;