State Transition Specifications:ASLAN Clock - 2

TRANSITION set_alarm (new_time: INTEGER) ENTRY TRUE EXIT (alarm_time = new_time)  & (if ((alarm_time = time) & (alarm = enabled)) then (bell = ringing) else (bell = bell????fi? ??????  &??time = time?) & (alarm = alarm?)

TRANSITION enable_alarm ENTRY alarm = disabled EXIT (alarm = enabled)  & (if (alarm_time = time)  then (bell = ringing) else (bell = bell?) fi)  & (time = time?) & (alarm_time = alarm_time?)

TRANSITION disable_alarm ENTRY alarm = enabled EXIT (alarm = disabled) & (bell = quiet)

END Top_Level

END Clock

Previous slide

Next slide

Back to first slide

View graphic version