示例#1
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 public void changeteacher_of_exist_course(course co, Teacher newte)
 {
     co.changeTeacher(co, newte);
 }
示例#2
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 public void printinfo_of_exist_course(course co)
 {
     co.printcourseinfo(co);
 }
示例#3
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 public void addstudent_to_existcourse(Student st, course co)
 {
     co.addstudent(st);
 }
示例#4
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 public void removestudent_to_existcourse(Student st, course co)
 {
     co.removestudent(st);
 }
示例#5
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 public void changeTeacher(course co, Teacher newte)
 {
     co.teacher = newte;
 }