Well, the return value of toupper so that literally changes this.

好的，toupper的返回值,也就改变了这个。

哈佛公开课 - 计算机科学课程节选

Instead I'm going to be expecting the address of some int and the address of another int and thanks to this address I can literally find this address in RAM, do anything I want there, -- return and what I've just done is actually changed or mutate the values of those original variables.

我们所期望的是int型地址,和另外一个int型地址,幸亏这个地址，我可以找在RAM中找到它的地址，然后做我想做的事情，返回我处理后的东西,我可能改变了这些源变量。

哈佛公开课 - 计算机科学课程节选