| toupper(3) | lower case to upper case letter conversion |
| ctype, digittoint, isalnum, isalpha, isascii, iscntrl, isdigit, isgraph, ishexnumber, isideogram, islower, isnumber, isphonogram, isprint, ispunct, isrune, isspace, isspecial, isupper, isxdigit, toascii, tolower, toupper, isblank(3) | character classification functions |
| TOUPPER(3) | MidnightBSD Library Functions Manual | TOUPPER(3) |
toupper — lower
case to upper case letter conversion
Standard C Library (libc, -lc)
#include
<ctype.h>
int
toupper(int
c);
The
toupper()
function converts a lower-case letter to the corresponding upper-case
letter. The argument must be representable as an unsigned
char or the value of EOF.
If the argument is a lower-case letter, the
toupper() function returns the corresponding
upper-case letter if there is one; otherwise, the argument is returned
unchanged.
The 4.4BSD extension of accepting
arguments outside of the range of the unsigned char
type in locales with large character sets is considered obsolete and may not
be supported in future releases. The towupper()
function should be used instead.
The toupper() function conforms to
ISO/IEC 9899:1990
(“ISO C90”).
| July 25, 2010 | midnightbsd-3.1 |