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.