October 2004
Beginner
408 pages
9h 24m
English
Content preview from C Programming: Visual Quickstart GuideBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Creating and Including Header Files
Although it's feasible to write an entire advanced C program in a single source file, accomplishing that task would be unnecessarily tedious and edits would require more effort than otherwise necessary. By using the C preprocessor, you can break complex applications down into multiple files, while still retaining the same functionality.
The #include directive provides a mechanism for including the contents of another file while compiling a primary file. You've seen this many times with the stdio.h include.
Quite often, these included files are in separate source files that exist solely to provide function declarations, macro definitions, and other nonfunction code. These included files are called header files ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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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.