NAME
cabs(), cabsf() — complex absolute value (also called norm, modulus, or magnitude) functions
SYNOPSIS
#include <complex.h>
double cabs(double complex z);
float cabsf(float complex z);
DESCRIPTION
These functions are available only for IA-64.
cabs()
returns the
complex absolute value of
z.
cabsf()
is a
float
complex
version of
cabs();
it takes a
float
complex
argument and returns a
float
result.
USAGE
To use these functions,
compile with the default
-Ae
option.
Make sure your program includes
<complex.h>.
Link in the math library by specifying
-lm
on the compiler or linker command line.
RETURN VALUES
cabs(z)
returns the same values and raises the same floating-point exceptions as
hypot(creal(z),cimag(z)).
If the
+Onocxlimitedrange
compiler option (default for HP's C/C++) is not in effect,
then
cabs()
may be computed with a simpler formula that does
not match the specification for extreme values.
ERRORS
No errors are defined.
STANDARDS CONFORMANCE
cabs(),
cabsf()
:ISO/IEC C99 (including Annex G, "IEC 60559-compatible complex arithmetic")
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