#ifndef _CTYPE_H#define _CTYPE_H#include <sys/cdefs.h>externintisascii(int c) __THROW;externintisblank(int c) __THROW;externintisalnum(int c) __THROW;externintisalpha(int c) __THROW;externintisdigit(int c) __THROW;externintisspace(int c) __THROW;#endif