C Standard Library header files

 

C

Language

Standard Library

Type support

Dynamic memory management

Error handling

Program utilities

Date and time utilities

Strings library

Algorithms

Numerics

Input/output support

Localization support

Thread support (C11)

Atomic operations (C11)

 

<assert.h>	Conditionally compiled macro that compares its argument to zero
<complex.h> (since C99)	Complex number arithmetic
<ctype.h>	Functions to determine the type contained in character data
<errno.h>	Macros reporting error conditions
<fenv.h> (since C99)	Floating-point environment
<float.h>	Limits of float types
<inttypes.h> (since C99)	Format conversion of integer types
<iso646.h> (since C99)	Alternative operator spellings
<limits.h>	Sizes of basic types
<locale.h>	Localization utilities
<math.h>	Common mathematics functions
<setjmp.h>	Nonlocal jumps
<signal.h>	Signal handling
<stdalign.h> (since C11)	Type alignment control
<stdarg.h>	Variable arguments
<stdatomic.h> (since C11)	Atomic types
<stdbool.h> (since C99)	Macros supporting type bool
<stddef.h>	Common macro definitions
<stdint.h> (since C99)	Fixed-width integer types
<stdio.h>	Input/output
<stdlib.h>	General utilities: memory management, program utilities, string conversions, random numbers
<stdnoreturn.h> (since C11)	Non-returning functions
<string.h>	String handling
<tgmath.h> (since C99)	Type-generic math (macros wrapping math.h and complex.h)
<threads.h> (since C11)	Thread library
<time.h>	Time/date utilities
<uchar.h> (since C11)	UTF-16 and UTF-32 character utilities
<wchar.h> (since C99)	Extended multibyte and wide character utilities
<wctype.h> (since C99)	Wide character classification and mapping utilities

See also

C++ documentation for C++ Standard Library header files