- Well, just a moment ago, we did have -- -- and this time I'll use some chalk here -- a moment ago, we did have a picture depicting what was going on when you call the function.

好的，刚才，我们确实有-,这一次我将用一些粉笔-,刚才，我们有一张图描绘了当我们调用函数的时候,会发生什么事情。

哈佛公开课 - 计算机科学课程节选

And then as soon as the function returns, you kinda have to unwind but remember where you were just a moment ago.

一旦函数返回,你必须记得之前在哪个位置。

哈佛公开课 - 计算机科学课程节选

We'll see in a moment there's a special function.

一会儿我们将看到它是一个特殊的函数。

哈佛公开课 - 计算机科学课程节选

Well, for a thing called main which itself is a function but a function I wrote, a tool I am writing at the moment not like printf which someone else wrote long ago, I have to say where does main start, where does main end, and I do that by using these curly braces.

至于这个名曰main的函数,由我们自己写的函数，也是一个工具,只不过由我们自己编写，而不是像printf那样已经由前人写好了,我们必须要说明main在哪开始，在哪结束，这样我们就要用到大括号了。

哈佛公开课 - 计算机科学课程节选