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Linux and UNIX Man Pages

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OSX 10.14 Mojave - man page for creal (mojave section 3)

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

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