cimag(3) [osx man page]

CREAL(3)						   BSD Library Functions Manual 						  CREAL(3)

NAME

     creal -- complex real-part function
     cimag -- complex imaginary-part function

SYNOPSIS

     #include <complex.h>

     double
     creal(double complex z);

     long double
     creall(long double complex z);

     float
     crealf(float complex z);

     double
     cimag(double complex z);

     long double
     cimagl(long double complex z);

     float
     cimagf(float complex z);

DESCRIPTION

     creal(z) extracts the real part of the complex floating-point number z.  cimag(z) extracts the imaginary part of the complex floating-point
     number z.

     If z = x+iy, then creal(z) = x and cimag(z) = y.

EXAMPLES

     The function foo defined in the example below returns its complex argument with the imaginary part scaled by a factor of 2.

	   #include <complex.h>

	   double complex foo(double complex z) {
	     return creal(z) + 2.0*cimag(z)*I;
	   }

SEE ALSO

     complex(3)

STANDARDS

     The creal() and cimag() functions conform to ISO/IEC 9899:2011.

4th Berkeley Distribution					 December 11, 2006					 4th Berkeley Distribution

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