练习三

1..*AssignedTo

Student

- name :int- studentId :int

+addCourse () :boolean+removeCourse () :boolean

*

1..*

Course

- name :String-courseId :int

School

- name ：String- address ：String- telephone：String

+ addStudent () :boolean + removeStudent () :boolean+getStudent () :String+getAllStudents () :int+addDepartment () :boolean+removeDepartment () :boolean+getDepartment () :String+getAllStudents () :int

1..*teach

*attend

0..1

0..1chariPerson

Department

- name :int

+addInstructor ():boolean+removeInstructor ():boolean+getInstructor ():String+getAllInstructor ():int

1.1

Instructor

+ attribute1:type = defaultValue+ attribute2:type- attribute3:type

+addCourse () :boolean+removeCourse () :boolean

1..1has