Right now it's empty, actually it's not quite empty, it has a pointer back to the class.
当我调用了这个类的,定义声明的时候,它在内存中的特定点。
If I want to get out right now the versions of these things, I can ask what's the value of c p 1 x, and it returns it back out.
你可以在那里看到那些,代表笛卡尔坐标点的东西,如果我想要得到现在,这个类的版本的东西的话。
So when I type, I'm sorry, I shouldn't say type, c point although I would have typed it, p dot x, here's what basically happens.
处于特定点的实例的这个概念,我知道它来自于这个类,这个类,when,I,write,因此当我输入,抱歉,我不该说输入的,当我写,虽然我需要输入它,p,x的时候。
I'm going to build, this case, a Cartesian point, I'm going to build a second Cartesian point, and my segment passes in those class instances.
我要去建立,在这个例子中,建立一个笛卡尔点,然后再建立一个笛卡尔点,然后向我的segment类。
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