You write the source code, the stuff that looks like this and then you save your file, and now you just have a text file.

比如你们写出像这样的源代码后,保存，你将会得到一个文本文件。

哈佛公开课 - 计算机科学课程节选

But once you've written a program, "hello world," in a file called hello.c, you Save and Quit.

不过一旦你们写了一个“hello，world“程序“,并且把它保存为hello，c文件后退出。

哈佛公开课 - 计算机科学课程节选