NAME
complex — complex functions and macros
DESCRIPTION
This file contains declarations of all the functions in the
Complex Library (described in Section (3M)).
It defines the types
- extended
The Itanium-based system 80-bit double-extended type.
- quad
An IEEE 754-compliant,
128-bit floating-point type.
On HP-UX,
quad
is a synonym for
long double.
It defines the macros
- complex
Expands to
_Complex,
a keyword designating complex types.
- imaginary
Expands to
_Imaginary,
a keyword designating imaginary types.
These macros and the names of the real types, in combination, provide designations for
the complex and imaginary types
- float complex
- double complex
- long double complex
- extended complex
- quad complex
- float imaginary
- double imaginary
- long double imaginary
- extended imaginary
- quad imaginary
This file also defines the macros
- _Imaginary_I
Expands to a constant expression of type
const float imaginary,
with the value of the imaginary unit (a number whose square is -1).
- _Complex_I
Expands to a constant expression of type
const float complex,
with the value of the imaginary unit.
- I
Expands to
_Imaginary_I.
It can be used to efficiently construct complex expressions in the style
x + y*I,
where
x
and
y
are real.
This header is for Itanium-based systems only. To use it,
compile with the default
-Ae
option.
To use the types
extended complex,
quad complex,
extended imaginary,
or
quad imaginary,
compile with the
-fpwidetypes
option.
FILES
/usr/include/complex.h
STANDARDS CONFORMANCE
<complex.h>
: ISO/IEC C99 (including Annex G, ``IEC 60559-compatible complex arithmetic'')
