printf That's not actually where someone implemented print F and related functions, rather, in dot H files, by convention, are prototypes.

那实际不是有某人在哪里执行,相关函数，而是在，h文件中，按照惯例，它们是函数原型。

哈佛公开课 - 计算机科学课程节选

Well, you don't have to just take what you've been handed round in life, functions like print F or round or maybe other functions you've seen in super sections or by poking around.

好的，你没必要把传给你的参数保存起来,像函数printf或者,或者你们看到的其他的函数,在超级课程中或闲逛的时候。

哈佛公开课 - 计算机科学课程节选