Section: Linux Programmer's Manual (3)
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cimag, cimagf, cimagl - get imaginary part of a complex number
double cimag(double complex z);
float cimagf(float complex z);
long double cimagl(long double complex z);
Link with -lm.
These functions return the imaginary part of the complex number
z = creal(z) + I * cimag(z)
These functions first appeared in glibc in version 2.1.
For an explanation of the terms used in this section, see
C99, POSIX.1-2001, POSIX.1-2008.
gcc also supports __imag__.
That is a GNU extension.
This page is part of release 4.15 of the Linux
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Time: 12:40:24 GMT, January 17, 2019