September 2025
Intermediate to advanced
552 pages
14h 5m
English
Content preview from Modern C, Third Edition
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C. C libraries
Not surprisingly, C library implementations lack most of the support for C23 for now. In the following, we discuss some of the additions that come with C23. At the end, section C.7, we will report on a project for Linux systems that you can use temporarily until your C implementation provides full support for the library parts of C23.
C.1 Functions borrowed from POSIX or similar systems
The following functions are harmonized with POSIX:
strftimegmtime_rlocaltime_rmemccpystrdupstrndup
So, if you are on such a system (such as Linux or macOS) or program in a compatible environment, you should already have these functions. Another candidate for a function you will most likely already find on such systems is timegm ...
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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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