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NAME

ctype.h - character types
 

SYNOPSIS

#include <ctype.h>  

DESCRIPTION

Some of the functionality described on this reference page extends the ISO C standard. Applications shall define the appropriate feature test macro (see the System Interfaces volume of IEEE Std 1003.1-2001, Section 2.2, The Compilation Environment) to enable the visibility of these symbols in this header.

The following shall be declared as functions and may also be defined as macros. Function prototypes shall be provided.

int   isalnum(int);
int   isalpha(int);

int   isascii(int);

int   isblank(int);
int   iscntrl(int);
int   isdigit(int);
int   isgraph(int);
int   islower(int);
int   isprint(int);
int   ispunct(int);
int   isspace(int);
int   isupper(int);
int   isxdigit(int);

int   toascii(int);

int   tolower(int);
int   toupper(int);

The following are defined as macros:

int   _toupper(int);
int   _tolower(int);

The following sections are informative.  

APPLICATION USAGE

None.  

RATIONALE

None.  

FUTURE DIRECTIONS

None.  

SEE ALSO

<locale.h> , the System Interfaces volume of IEEE Std 1003.1-2001, isalnum(), isalpha(), isascii(), iscntrl(), isdigit(), isgraph(), islower(), isprint(), ispunct(), isspace(), isupper(), isxdigit(), mblen(), mbstowcs(), mbtowc(), setlocale(), toascii(), tolower(), _tolower(), toupper(), _toupper(), wcstombs(), wctomb()  

COPYRIGHT

Index

NAME

SYNOPSIS

DESCRIPTION

APPLICATION USAGE

RATIONALE

FUTURE DIRECTIONS

SEE ALSO

COPYRIGHT

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