Originální popis anglicky:
cbrt, cbrtf, cbrtl - cube root functions
Návod, kniha: POSIX Programmer's Manual
#include <math.h>
double cbrt(double
x);
float cbrtf(float
x);
long double cbrtl(long double
x);
These functions shall compute the real cube root of their argument
x.
Upon successful completion, these functions shall return the cube root of
x.
If
x is NaN, a NaN shall be returned.
If
x is ±0 or ±Inf,
x shall be returned.
No errors are defined.
The following sections are informative.
None.
None.
For some applications, a true cube root function, which returns negative results
for negative arguments, is more appropriate than
pow(
x,
1.0/3.0), which returns a NaN for
x less than 0.
None.
The Base Definitions volume of IEEE Std 1003.1-2001,
<math.h>
Portions of this text are reprinted and reproduced in electronic form from IEEE
Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable
Operating System Interface (POSIX), The Open Group Base Specifications Issue
6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics
Engineers, Inc and The Open Group. In the event of any discrepancy between
this version and the original IEEE and The Open Group Standard, the original
IEEE and The Open Group Standard is the referee document. The original
Standard can be obtained online at http://www.opengroup.org/unix/online.html
.
