Provides a way to choose one of several expressions at compile time, based on a type of a controlling expression. Syntax

Defined in header <string.h>

Usage automatic

Defined in header <math.h>

Defined in header <wchar.h>

Defined in header <string.h>

Defined in header <wchar.h>

Defined in header <wctype.h>

Defined in header <threads.h>

Defined in header <ctype.h>