ctype.h

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#ifndef __CTYPE_H__
#define __CTYPE_H__
 
int isspace(int c);
int isascii(int c);
int isupper(int c);
int islower(int c);
int isalpha(int c);
int isdigit(int c);
int isxdigit(int c);
int isprint(int c);
int toupper(int c);
int tolower(int c);
int toascii(int c);
 
 
#endif