cpow(), cpowf(), cpowl()

Raise a complex number to the power of another complex number

Synopsis:

#include <complex.h>

double complex cpow( double complex x,
                     double complex y );

float complex cpowf( float complex x,
                     float complex y );

long double complex cpowl( long double complex x,
                           long double complex y );

Arguments:

x: The number you want to raise.
y: The power you want to raise the number to.

Library:

libm

Use the -l m option to qcc to link against this library.

Description:

These functions compute the complex power function, x^y, with a branch cut for the first parameter along the negative real axis.

To check for error situations, use feclearexcept() and fetestexcept(). For example:

Call feclearexcept(FE_ALL_EXCEPT) before calling cpow(), cpowf(), or cpowl().
On return, if fetestexcept(FE_ALL_EXCEPT) is nonzero, then an error has occurred.

Returns:

The complex power, x^y. Errors and special cases are handled as if the operation were implemented as cexp(y * clog(x)).

These functions raise FE_INEXACT if the FPU reports that the result can't be exactly represented as a floating-point number.

Classification:

ANSI, POSIX 1003.1

Safety:
Cancellation point	No
Interrupt handler	No
Signal handler	No
Thread	Yes