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LEARN ABOUT FREEBSD

cimag

CIMAG(3)						   BSD Library Functions Manual 						  CIMAG(3)

NAME

     cimag, cimagf, cimagl, conj, conjf, conjl, cproj, cprojf, cprojl, creal, crealf, creall -- functions to manipulate complex numbers

LIBRARY

     Math Library (libm, -lm)

SYNOPSIS

     #include <complex.h>

     double
     cimag(double complex z);

     float
     cimagf(float complex z);

     long double
     cimagl(long double complex z);

     double complex
     conj(double complex z);

     float complex
     conjf(float complex z);

     long double complex
     conjl(long double complex z);

     double complex
     cproj(double complex z);

     float complex
     cprojf(float complex z);

     long double complex
     cprojl(long double complex z);

     double
     creal(double complex z);

     float
     crealf(float complex z);

     long double
     creall(long double complex z);

DESCRIPTION

     Let a+b*i denote the complex number z.

     The creal() functions return the real part a, and the cimag() functions return the imaginary part b.

     The conj() functions return the complex conjugate a-b*i.

     The cproj() functions return the projection onto the Riemann sphere.  If z contains an infinite component, then the result is infinity +-
     0*i, where the (zero) imaginary part of the result has the same sign as b.  Otherwise, the result is z.

     These functions do not signal any floating point exceptions.

STANDARDS

     The cimag(), conj(), cproj(), and creal() functions conform to ISO/IEC 9899:1999 (``ISO C99'').

HISTORY

     The cimag(), conj() and creal() functions first appeared in FreeBSD 5.3.  The cproj() functions appeared in FreeBSD 8.0.

BSD
								  August 7, 2008							       BSD