cbrt.3m (2010 09)

c
cbrt(3M) cbrt(3M)
NAME
cbrt( ), cbrtf( ), cbrtl( ), cbrtw( ), cbrtq( ) - cube root functions
SYNOPSIS
#include <math.h>
double cbrt(double x);
float cbrtf(float x);
HP Integrity Server Only
long double cbrtl(long double x);
extended cbrtw(extended x);
quad cbrtq(quad x);
DESCRIPTION
cbrt() computes the cube root of x.
cbrtf() is a float version of cbrt(); it takes a
float argument and returns a float result.
Integrity Server Only
cbrtl() is a long double version of cbrt(); it takes a long double argument and returns a
long double result.
cbrtw() is an extended version of cbrt(); it takes an extended argument and returns an
extended result.
cbrtq() is equivalent to cbrtl() on HP-UX systems.
USAGE
To use these functions, compile either with the default
-Ae option or with the -Aa
and
-D_HPUX_SOURCE options.
To use (for Integrity servers)
cbrtw() or cbrtq(), compile also with the -fpwidetypes option.
To use any of these functions, make sure your program includes
<math.h>, and link in the math library
by specifying -lm on the compiler or linker command line.
For more information, see the HP-UX floating-point guide for HP Integrity servers at the following site:
http://www.hp.com/go/fp
.
RETURN VALUE
If x is ±INFINITY or ±zero,
cbrt() returns x.
If x is NaN,
cbrt() returns NaN.
cbrt() raises the inexact exception whenever a rounded result does not equal the mathematical result.
ERRORS
No errors are defined.
SEE ALSO
exp(3M), log(3M), pow(3M), sqrt(3M), math(5).
STANDARDS CONFORMANCE
cbrt() : SVID3, XPG4.2, ISO/IEC C99 (including Annex F, ‘‘IEC 60559 floating-point arithmetic’’)
cbrtf(), cbrtl() : ISO/IEC C99 (including Annex F, ‘‘IEC 60559 floating-point arithmetic’’)
HP-UX 11i Version 3: September 2010 − 1 − Hewlett-Packard Company 1