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#include <complex.h>
1.4 * _Complex_I;
//complex.h
#define _DCOMPLEX_(re, im) _Cbuild(re, im)
#define _FCOMPLEX_(re, im) _FCbuild(re, im)
#define _LCOMPLEX_(re, im) _LCbuild(re, im)
#define _Complex_I _FCbuild(0.0F, 1.0F)
#define I _Complex_I