java实验7.1(CollegeCourse.java)
WriteaprogramcalledCollegeCoursethatcomputesthecostoftakingacollegecourse.IncludeaconstructorthatrequiresacourseIDnumber.AddasubclassLabtocomputealabfeeforacoursethatusesalab.WriteaprogramUseCoursetousetheclasses.SavetheprograsasCollegeCourse,Lab,andUseCourse.Putthemalli
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