carg, cargf—argument (phase angle)Synopsis
#include <complex.h> double carg(double complex z); float cargf(float complex z);
Description
These functions compute the argument (also called phase angle)
of z, with a branch cut along the negative real axis.
cargf is identical to carg, except that it performs
its calculations on floats complex.
Returns
The carg functions return the value of the argument in the
interval [-pi, +pi]
Portability
carg and cargf are ISO C99