我怎么能旋转的形状在一个矩阵c 90度吗？

How can I rotate a shape in a matrix by 90 degrees in c?

youdao

楼层间的太阳能电池板和横向风轮机将产生能使之旋转的动力。

Solar panels and horizontal wind turbines between the floors would generate the power needed to turn it.

youdao

课堂上我们已经看到,怎样在物体旋转时,将机械能,转化成电能的，演示例子。

We have already seen a demonstration in class whereby we converted mechanical energy when someone was rotating, into electric energy.

youdao

So if we say that l is just talking about our kinetic energy part, our rotational kinetic energy, and we know that electrons have potential energy, then it makes sense that l, in fact, can never go higher than n.

如果我们说，l仅仅是,描述动能项，我们的旋转动能，我们知道，电子有势能，所以可以理解，l不能比n高。

麻省理工公开课 - 化学原理课程节选