Defined in header <stdio.h>

Defined in header <<fenv.h>>

Defined in header <wchar.h>

Defined in header <stdio.h>

Defined in header <stdio.h>

Defined in header <stdatomic.h>

C source code may be written in any non-ASCII 7-bit character set that includes the

Defined in header <stdatomic.h>

The preprocessor supports conditional compilation of parts of a source file. This behavior is controlled by #if, #else, #elif, #ifdef

Defined in header <stdlib.h>