|
|
|
|
|
|
|
HP-UX Reference > C
cabs(3M)Itanium(R)-based System OnlyHP-UX 11i Version 2: December 2007 Update |
|
NAMEcabs(), cabsf(), cabsl(), cabsw(), cabsq() — complex absolute value (also called norm, modulus, or magnitude) functions SYNOPSIS#include <complex.h> double cabs(double complex z); float cabsf(float complex z); long double cabsl(long double complex z); extended cabsw(extended complex z); quad cabsq(quad complex z); DESCRIPTIONThese functions are available only for Itanium-based systems. 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. cabsl() is a long double complex version of cabs(); it takes a long double complex argument and returns a long double result. cabsw() is an extended complex version of cabs(); it takes an extended complex argument and returns an extended result. cabsq() is equivalent to cabsl() on HP-UX systems. USAGETo use these functions, compile with the default -Ae option. To use cabsw() or cabsq(), compile with the -fpwidetypes option. Make sure your program includes <complex.h>. Link in the math library by specifying -lm on the compiler or linker command line. RETURN VALUEcabs(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. |
||||||||||||||||||||||||||||
|
|||||||||
