You actually need to kind of do this and then you can swap these two numbers but it requires 50 percent more memory.

你实际上需要这样做,然后才能交换两个数字,但是它需要多50%的内存。

哈佛公开课 - 计算机科学课程节选

5 6 1 2 3 So it's 4, 5, 6 comma 1, 2, 3 that are passed into swap and that's why those same numbers end up in A and B. Yeah?

所以这里是,这就是为什么这些数字最终在a和b中，请说？

哈佛公开课 - 计算机科学课程节选