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carg
Langue: en
Version: 2002-07-28 (fedora - 16/08/07)
Section: 3 (Bibliothèques de fonctions)
NAME
carg, cargf, cargl - calculate the argumentSYNOPSIS
#include <complex.h>double carg(double complex z);
float cargf(float complex z);
long double cargl(long double complex z);
Link with -lm.
DESCRIPTION
A complex number can be described by two real coordinates. One may use rectangular coordinates and gets z = x+I*y, where x = creal(z) and y = cimag(z).Or one may use polar coordinates and gets z = r*cexp(I*a) where r = cabs(z) is the "radius", the "modulus", the absolute value of z, and a = carg(z) is the "phase angle", the argument of z.
One has tan(carg(z)) = cimag(z) / creal(z).
RETURN VALUE
The return value is the range of [-pi,pi].CONFORMING TO
C99SEE ALSO
cabs(3), complex(7)Contenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre