ctype.h

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#nolist
#ifndef islower

#define islower(x)  isamoung(x,"abcdefghijklmnopqrstuvwxyz")
#define isupper(x)  isamoung(x,"ABCDEFGHIJKLMNOPQRSTUVWXYZ")
#define isalnum(x)  isamoung(x,"0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz")
#define isalpha(x)  isamoung(x,"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz")
#define isdigit(x)  isamoung(x,"0123456789")
#define isspace(x)  (x==' ')
#define isxdigit(x) isamoung(x,"0123456789ABCDEFabcdef")

#endif

#list