enum Student{ case Name(String) case Mark(Int,Int,Int) } var studDetails = Student.Name("W3xue") var studMarks = Student.Mark(98,97,95) switch studMarks { case .Name(let studName): print("学生的名字是: \(studName)。") case .Mark(let Mark1, let Mark2, let Mark3): print("学生的成绩是: \(Mark1),\(Mark2),\(Mark3)。") }