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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 imagi-nary imaginary
     nary 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 9899:1999(E).

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