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MACHINE SystemeDeReservation ( nbMaxVoiture , nbPlaces )

MACHINE SystemeDeReservation ( nbMaxVoiture , nbPlaces ) DEFINITIONS place == ( 1..nbPlaces ) ; SIEGE == ( ens_voiture ´ place ) CONSTRAINTS nbMaxVoiture Î NAT1 Ù nbPlaces Î NAT1 Ù nbMaxVoiture ´ nbPlaces Î NAT1 SETS VOITURES ; NUMEROS

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MACHINE SystemeDeReservation ( nbMaxVoiture , nbPlaces )

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  1. MACHINE SystemeDeReservation(nbMaxVoiture, nbPlaces) DEFINITIONS place == (1..nbPlaces) ; SIEGE == (ens_voiture´place) CONSTRAINTS nbMaxVoitureÎNAT1Ù nbPlacesÎNAT1Ù nbMaxVoiture´nbPlacesÎNAT1 SETS VOITURES; NUMEROS VARIABLES ens_reservation, ens_octroye, ens_voiture INVARIANT ens_reservationÍNUMEROSÙ ens_voitureÍVOITURESÙ card(ens_voiture) £nbMaxVoitureÙ card(place) £nbPlacesÙ card(ens_reservation) £card(ens_voiture) ´ nbPlacesÙ ens_octroyeÎens_reservationSIEGE INITIALISATION ens_reservation, ens_octroye := Æ,Æ || ANYvvWHEREvvÎVOITURES – ens_voiture THENens_voiture := {vv} END OPERATIONS  nv¬AjoutVoiture = PREcard(ens_voiture) < nbMaxVoiture THEN ANYvvWHEREvvÎVOITURES – ens_voiture THENens_voiture := ens_voitureÈ{vv} || nv := vv END END; ok,num¬Reservation =BEGIN IFcard(ens_reservation) = card(ens_voiture) ´ nbPlaces THENok := FALSE || num :ÎNUMEROS ELSE ok := TRUE || ANYnnWHEREnnÎNUMEROS - ens_reservation THENens_reservation := ens_reservationÈ{nn} || num := nn END END END; Annuler(num) = PREnumÎens_reservation THEN IFnumÎdom(ens_octroye) THENens_octroye := {num} ens_octroye || ens_reservation := ens_reservation - {num} ELSEens_reservation := ens_reservation - {num} END END; nv,np¬Confirmer(num) = PREnumÎens_reservationÙnumÏdom(ens_octroye) THEN ANYvo,plWHERE ((vo,pl) ÎSIEGE) Ù ((vo,pl) Ïran(ens_octroye)) THENens_octroye := ens_octroyeÈ {num|-> (vo,pl)} || nv := vo || np := pl END END END

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