<cwctype>
The latest version of this topic can be found at <cwctype>.
Includes the Standard C library header <wctype.h> and adds the associated names to the std
namespace.
Syntax
#include <cwctype>
Remarks
Including this header ensures that the names declared using external linkage in the Standard C library header are declared in the std
namespace.
See Also
Header Files Reference
STL Overview
Thread Safety in the C++ Standard Library