<cctype>#include <ctype.h>
namespace std {
using ::isalnum; using ::isalpha; using ::iscntrl;
using ::isdigit; using ::isgraph; using ::islower;
using ::isprint; using ::ispunct; using ::isspace;
using ::isupper; using ::isxdigit; using ::tolower;
using ::toupper;
};
Include the standard header <cctype>
to effectively include the standard header
<ctype.h> within the
std namespace.
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Copyright © 1992-1996 by P.J. Plauger. All rights reserved.