If the macro constant __STDC_NO_COMPLEX__ is defined by the implementation, the complex types, the header
Defined in header <time.h>
Defined in header <wchar.h>
The preprocessor is executed at translation phase 4
Defined in header <stdio.h>
Defined in header <setjmp.h>
Defined in header <stdatomic.h>
Defined in header <math.h>
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