NAME
cbrt(), cbrtf() — cube root functions
SYNOPSIS
#include <math.h>
double cbrt(double x);
float cbrtf(float x);
DESCRIPTION
cbrt()
returns the cube root of
x.
The ISO/ANSI C committee has approved the
cbrt()
function for inclusion in the C9X draft standard.
cbrtf()
is a
float
version of
cbrt();
it takes a
float
argument and returns a
float
result.
cbrtf()
is not specified by any standard, but it is
named in accordance with the conventions
specified in the "Future Library Directions" section of the
ANSI C standard.
To use these functions, compile either with the default
-Ae
option or with the
-Aa
and
-D_HPUX_SOURCE
options. Make sure your program includes
<math.h>.
Link in the math library by specifying
-lm
on the compiler or linker command line.
RETURN VALUE
If
x
is ±INFINITY,
cbrt()
returns ±INFINITY.
If
x
is NaN,
cbrt()
returns NaN.
ERRORS
No errors are defined.
STANDARDS CONFORMANCE
cbrt(): SVID3, XPG4.2
