对象类型(OBJTYPE)。
Creating the Order business object type.
创建Order业务对象类型。
This relationship extends to object type.
这种关系扩展到对象类型。
And the problem is, that we want to build this abstract data type, but we'd like to basically know what kind of object is it, and what functions actually belong to it, how do we use them?
然后我对它们运行了这个方法,就是这一小段代码这个方法,这有意义么?,当然没有了,对不对?,因为你知道,当你把两个极坐标,表示的点进行相加运算的时候?
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