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class Student
{
public string Class;
public Teacher teache;
public Degree DegreeToReceive;
public void Register(Course c)//关联
{ }
}
class Course
{
private string name;
public Course(string name)
{
this.name=name;
}
}
Student A=new Student();
A.Register(new Course("Math"));//链接
class Vehicle
{
//聚合
private Engine engine;
private GearBox gearbox;
private Wheel wheel;
}
class Engine
{
}
class GearBox
{ }
class Wheel
{ }
class GraduateStudent : Student//继承
{
public Degree DegreeReceived;
public University GraduatedFrom;
}