这是一个代码片段:
car1AddCid <- submit dealer1 do
carCid <- create Car with
dealer = dealer1
insurer = insurance1
vin = "1A"
daily_insurance_rate = 1.5
daily_rate_APD = 0.16
covered = False
observers = [insurance1]
date_vehicle_added = date 1970 Jan 1 -- must be initialized to something
exercise carCid Add_Car with startCoverage = date 2019 Apr 5
不接受使用日期功能。我试着把yyyy mmm d
in""
和 in放进去()
。如何指定日期?