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HP Integrity Server Only
HP-UX 11i Version 3: February 2007

Technical documentation

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carg(), cargf(), cargl(), cargw(), cargq() — complex argument (also called phase angle) functions


#include <complex.h>

double carg(double complex z);

float cargf(float complex z);

long double cargl(long double complex z);

extended cargw(extended complex z);

quad cargq(quad complex z);


These functions are available only for Integrity servers.

carg() returns the complex argument of z in the interval [-pi,+pi].

cargf() is a float complex version of carg(); it takes a float complex argument and returns a float result.

cargl() is a long double complex version of carg(); it takes a long double complex argument and returns a long double result.

cargw() is an extended complex version of carg(); it takes an extended complex argument and returns an extended result.

cargq() is equivalent to cargl() on HP-UX systems.


To use these functions, compile with the default -Ae option. To use cargw() or cargq(), 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.


carg(z) returns the same values and raises the same exceptions as atan2(cimag(z),creal(z)).


No errors are defined.


carg(), cargf(), cargl() : ISO/IEC C99 (including Annex G, ``IEC 60559-compatible complex arithmetic'')

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