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类图讲解错误 #47

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@yinabameguru

看懂UML类图和时序图

小汽车与发动机之间是组合关系,使用带实心箭头的实线表示;

没有汽车,发动机也可以独立存在,汽车与发动机应该是聚合关系。同理,汽车和轮胎也是聚合关系。

我参考的这篇文章上的内容the-class-diagram

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