GNU/Linux man pages
Livre :
Expressions régulières,
Syntaxe et mise en oeuvre :
GNU/Linux |
CentOS 4.8 |
i386 |
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creal(3) |
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creal, crealf, creall − get real part of a complex number
#include <complex.h>
double creal(double complex z);
float crealf(float double complex z);
long double creall(long double complex z);
The creal() function returns the real part of the complex number z.
One has z = creal(z) + I*cimag(z).
The gcc supports also __real__. That is a GNU extension.
C99
cabs(3), cimag(3), complex(5)
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creal(3) | |