creal, crealf, creall - get real part of a complex number
double creal(double complex
float crealf(float complex
long double creall(long double complex
These functions return the real part of the complex number
z = creal(z) + I * cimag(z)
These functions first appeared in glibc in version 2.1.
C99, POSIX.1-2001, POSIX.1-2008.
The gcc supports also __real__. That is a GNU extension.
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