The General Utilities Library
The general utilities library contains a grab bag of functions, including a random number generator, searching and sorting functions, conversion functions, and memory management functions. You've already seen rand(), srand(), malloc(), and free() in Chapter 12, “Storage Classes, Linkage, and Memory Management.” Under ANSI C, prototypes for these functions exist in the stdlib.h header file. Reference Section V lists all the functions in this family; we'll take a closer look at a few of them now.
The exit() and atexit() Functions
We've already used exit() explicitly in several examples. In addition, the exit() function is invoked automatically upon return from main(). The ANSI standard has added a couple of nice features ...
Get C Primer Plus, Fourth Edition now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.