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fctype.h
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C/C++ Source or Header
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1993-05-15
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672b
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30 lines
/*
*
* This header file defines the prototypes the various "is" and
* "to" operations.
*
*/
extern unsigned char isalnum (char);
extern unsigned char isalpha (char);
extern unsigned char iscntrl (char);
extern unsigned char isdigit (char);
extern unsigned char isgraph (char);
extern unsigned char islower (char);
extern unsigned char isprint (char);
extern unsigned char ispunct (char);
extern unsigned char isspace (char);
extern unsigned char isupper (char);
extern unsigned char isxdigit (char);
extern unsigned char tolower (char);
extern unsigned char toupper (char);
/*
*
* Define NULL if it's not already defined
*
*/
#ifndef NULL
#define NULL 0
#endif