Often,the brains response is to create its own input, in the form of a hallucination.

VOA: special.2010.02.24

So we can provide any form of input here and the program will just keep working.

为您提供各种形式的输入,程序也一直工作。

哈佛公开课 - 计算机科学课程节选

But if it does take input, you have to provide it in the form of arguments or parameters, like print F takes, generally, inside of those parentheses.

但是如果它获得了输入，你需要为它提供相应格式的,参数或参量，像printf的输入，一般地，在这些圆括号里。

哈佛公开课 - 计算机科学课程节选