《Programming Abstractions In C》学习第 54 天，p138，总结如下：

一、技术总结

1.stdio.h

3.4 小节介绍“The standard I/O library”，涉及 I/O 操作最常用的接口是 stdio.h，我们经常用到里面的 printf 函数。

2.永久性数据以文件的形式进行存储

p138。

3.text file

p138, When you use a file to store data for use by a program, that file usually consist of text and is therefore called a text file。You can think of a text file as a sequence of characters stored in a permanent medium and identified by a file name。

二、英语总结

1.mostly 什么意思？

答：p132，“Every program in the text includes this interface, mostly because it exports the print function”。mostly 的意思是“adv. mainly(主要是)”。

2.persist 什么意思？

答：vi. continue to exist。

3.cohesive 什么意思？

答：adj. as in coherent(连贯的)。

4.floppy disk 是什么？

答：floppy 的意思是“adj. soft and not easy to keep a firm shape(松软的)”，所以 floppy disk 指的是“软盘”。

三、参考资料

1. 编程

(1)Eric S.Roberts，《Programming Abstractions in C》：https://book.douban.com/subject/2003414

2. 英语

(1)Etymology Dictionary：https://www.etymonline.com

(2) Cambridage Dictionary：https://dictionary.cambridge.org

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