MirOS Manual: toupper(3), _toupper(3)

TOUPPER(3)                 BSD Programmer's Manual                  TOUPPER(3)


     toupper, _toupper - lower case to upper case letter conversion


     #include <ctype.h>

     toupper(int c);

     _toupper(int c);


     The toupper() function converts a lower-case letter to the corresponding
     upper-case letter. The _toupper() function is identical to toupper() ex-
     cept that c must be a lower-case letter.


     If the argument to the toupper() function is a lower-case letter, the
     corresponding upper-case letter is returned if there is one; otherwise
     the argument is returned unchanged. If the argument to the _toupper()
     function is a lower-case letter, the corresponding upper-case letter is
     returned; otherwise the output is undefined.


     isalnum(3), isalpha(3), isascii(3), isblank(3), iscntrl(3), isdigit(3),
     isgraph(3), islower(3), isprint(3), ispunct(3), isspace(3), isupper(3),
     isxdigit(3), stdio(3), toascii(3), tolower(3), ascii(7)


     The toupper() function conforms to ANSI X3.159-1989 ("ANSI C").

MirOS BSD #10-current          August 15, 1997                               1

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