Header Purpose
complex.hcomplex arithmetic.
fenv.hGives access to the floating-point status flags and other aspects of the floating-point environment.
inttypes.hDefines a standard, portable set of integer type names. Also supports functions that handle greatest-width integers.
iso646.hAdded in 1995 by Amendment 1. Defines macros that correspond to various operators, such as && and ^.
stdbool.hSupports Boolean data types. Defines the macro bool, which helps with C++ compatibility.
stdint.hDefines a standard, portable set of integer type names. This file is included by .
tgmath.hDefines type-generic floating-point macros.
wchar.hmultibyte and wide-character functions.
wctype.hmultibyte and wide-character classification functions.
From
C: The Complete Reference, Fourth Edition
by Herbert Schildt
McGraw-Hill/Osborne 2000