ctype.h

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#pragma once
 
#include <ccpp/bits/config.h>
 
__CCPP_BEGIN_DECLARATIONS
 
int isalnum(int __ch);
int isalpha(int __ch);
#ifdef __CCPP_POSIX_EXTENSIONS
int isascii(int __ch);
#endif
int islower(int __ch);
int isupper(int __ch);
int isdigit(int __ch);
int isxdigit(int __ch);
int iscntrl(int __ch);
int isgraph(int __ch);
int isspace(int __ch);
#ifdef __CCPP_C99
int isblank(int __ch);
#endif
int isprint(int __ch);
int ispunct(int __ch);
 
int tolower(int __ch);
int toupper(int __ch);
 
__CCPP_END_DECLARATIONS