Manpage of TOUPPER
TOUPPER
Section: NEWLIB (3)
Updated: 2005 Feb 23
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NAME
2.14 `toupper'--translate characters to upper case
SYNOPSIS
#include <ctype.h>
int toupper(int C);
int _toupper(int C);
DESCRIPTION
`toupper' is a macro which converts lower-case characters to upper
case, leaving all other characters unchanged. It is only defined when
C is an integer in the range `EOF' to `255'.
You can use a compiled subroutine instead of the macro definition by
undefining this macro using ``#undef toupper''.
`_toupper' performs the same conversion as `toupper', but should
only be used when C is known to be a lowercase character (`a'-`z').
RETURNS
`toupper' returns the upper-case equivalent of C when it is a character
between `a' and `z', and C otherwise.
`_toupper' returns the upper-case equivalent of C when it is a
character between `a' and `z'. If C is not one of these characters,
the behaviour of `_toupper' is undefined.
PORTABILITY
`toupper' is ANSI C. `_toupper' is not recommended for portable
programs.
No supporting OS subroutines are required.
SEE ALSO
toupper
is part of the
libc
library.
The full documentation for
libc
is maintained as a Texinfo manual. If
info
and
libc
are properly installed at your site, the command
-
info libc
will give you access to the complete manual.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURNS
-
- PORTABILITY
-
- SEE ALSO
-
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Time: 21:25:33 GMT, May 16, 2005
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