October 2020
Beginner to intermediate
464 pages
8h 17m
English
Content preview from C Programming For Dummies, 2nd Edition
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Chapter 22
Permanent Storage Functions
IN THIS CHAPTER
Working with file functions
Reading and writing text to a file
Creating binary files
Using the fread() and fwrite() functions
Reading and writing records
Building a linked-list database
C programs work innately with storage in memory. Variables are created, values are set, locations are mapped. It’s all pretty much automatic, but the information that’s created is lost after the program runs.
For the long term, programs need to access permanent storage, writing and reading information to and from files. C comes with a host of interactive functions that let you create, read, write, and manipulate files. These are the permanent storage functions.
Sequential File Access
The simplest way that information can be written to or read from a file is sequentially, one byte after the other. The file contains one long stream of data. This ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.