Name
creal
Synopsis
Obtains the real part of a complex number
#include <complex.h> doublecreal
( double complexz
); floatcrealf
( float complexz
); long doublecreall
( long double complexz
);
A complex number is represented as two floating-point numbers,
one quantifying the real part and one quantifying the imaginary
part. The creal()
function
returns the floating-point number that represents the real part of
the complex argument.
Example
double complex z = 4.5 − 6.7 * I;
printf( "The complex variable z is equal to %.2f %+.2f \xD7 I.\n",creal
(z), cimag(z) );
This code produces the following output:
The complex variable z is equal to 4.50 -6.70 × I.
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