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NAME
carg, cargf, cargl - calculate the argument
SYNOPSIS
#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
C99
SEE ALSO
cabs (3) complex (7)
