Defined in header <wctype.h>

Defined in header <math.h>

Defined in header <stdlib.h>

Defined in header <stddef.h>

The floating-point environment is the set of floating-point status flags and control modes supported by the implementation. It is thread-local, each thread inherits the initial

Defined in header <math.h>

Defined in header <stddef.h>

Defined in header <threads.h>

Defined in header <stdatomic.h>

An enumerated type is a distinct type whose value is restricted to one of