ADC Home > Reference Library > Reference > Mac OS X > Mac OS X Man Pages
|
This document is a Mac OS X manual page. Manual pages are a command-line technology for providing documentation. You can view these manual pages locally using the man(1) command. These manual pages come from many different sources, and thus, have a variety of writing styles. For more information about the manual page format, see the manual page for manpages(5). |
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 argu-ment argument ment 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 9899:1999(E). 4th Berkeley Distribution October 10, 2006 4th Berkeley Distribution |