Defined in header <complex.h>

Defined in header <setjmp.h>

Defined in header <wctype.h>

Defined in header <threads.h>

Defined in header <stdlib.h>

Defined in header <complex.h>

Defined in header <signal.h>

Usage boolean type: as the declaration of the type

Usage _Alignof

Defined in header <complex.h>