Command:

CARG(3) Linux Programmer's Manual CARG(3)NAMEcarg, cargf, cargl - calculate the argumentSYNOPSIS#include<complex.h>doublecarg(doublecomplexz);floatcargf(floatcomplexz);longdoublecargl(longdoublecomplexz);Link with-lm.DESCRIPTIONA complex number can be described by two real coordinates. One may use rectangular coordinates and gets z = x + I * y wherex=creal(z)andy=cimag(z). Or one may use polar coordinates and gets z = r * cexp(I * a) wherer=cabs(z)is the "radius", the "modulus", the absolute value ofz, anda=carg(z)is the "phase angle", the argument ofz. One has: tan(carg(z)) = cimag(z) / creal(z)RETURNVALUEThe return value is the range of [-pi,pi].VERSIONSThese functions first appeared in glibc in version 2.1.CONFORMINGTOC99.SEEALSOcabs(3), complex(7)COLOPHONThis page is part of release 3.22 of the Linuxman-pagesproject. A description of the project, and informa- tion about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/. 2008-08-11 CARG(3)