C Programming Language, 2nd Edition

APPENDIX B: Standard Library

This appendix is a summary of the library defined by the ANSI standard. The standard library is not part of the C language proper, but an environment that supports standard C will provide the function declarations and type and macro definitions of this library. We have omitted a few functions that are of limited utility or easily synthesized from others; we have omitted multi-byte characters; and we have omitted discussion of locale issues, that is, properties that depend on local language, nationality, or culture.

The functions, types and macros of the standard library are declared in standard headers:

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<assert.h>  <float.h>   <math.h>    <stdarg.h>  <stdlib.h> <ctype.h>   <limits.h>  <setjmp.h>  <stddef.h>  <string.h> ...