@@
char T;
@@

- isalnum(T)
+ isalnum((unsigned char)T)

@@
char T;
@@

- isalpha(T)
+ isalpha((unsigned char)T)

@@
char T;
@@

- iscntrl(T)
+ iscntrl((unsigned char)T)

@@
char T;
@@

- isdigit(T)
+ isdigit((unsigned char)T)

@@
char T;
@@

- isgraph(T)
+ isgraph((unsigned char)T)

@@
char T;
@@

- islower(T)
+ islower((unsigned char)T)

@@
char T;
@@

- isprint(T)
+ isprint((unsigned char)T)

@@
char T;
@@

- ispunct(T)
+ ispunct((unsigned char)T)

@@
char T;
@@

- isspace(T)
+ isspace((unsigned char)T)

@@
char T;
@@

- isupper(T)
+ isupper((unsigned char)T)

@@
char T;
@@

- isxdigit(T)
+ isxdigit((unsigned char)T)

@@
char T;
@@

- isascii(T)
+ isascii((unsigned char)T)

@@
char T;
@@

- isblank(T)
+ isblank((unsigned char)T)

@@
char T;
@@

- tolower(T)
+ tolower((unsigned char)T)

@@
char T;
@@

- toupper(T)
+ toupper((unsigned char)T)