Compute the absolute value of a complex number
#include <complex.h> double cabs(double complex z); float cabsf(float complex z); long double cabsl(long double complex z);
These functions compute the absolute value of the complex number specified by z.
To check for error situations, use feclearexcept() and fetestexcept(). For example:
The absolute value of z.
These functions raise FE_INEXACT if the FPU reports that the result can't be exactly represented as a floating-point number.
Safety: | |
---|---|
Cancellation point | No |
Interrupt handler | No |
Signal handler | No |
Thread | Yes |