02-17-2016
Thanks rudic, I tried that code but nothing changed. I can get the original code I used to work as long as the objective letter is by itself e.g. not part of a 2+ letter word.
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conv(3C) conv(3C)
NAME
toupper(), tolower(), _toupper(), _tolower(), toascii() - translate characters
SYNOPSIS
DESCRIPTION
and have as domain the range of getc(3S): the integers from -1 through 255. If the argument of represents a lower-case letter, the result
is the corresponding upper-case letter. If the argument of represents an upper-case letter, the result is the corresponding lower-case
letter. All other arguments in the domain are returned unchanged. Arguments outside the domain cause undefined results.
The macros and are identical to and respectively.
yields its argument with all bits that are not part of a standard 7-bit ASCII character cleared; it is intended for compatibility with
other systems.
WARNINGS
is supplied both as a library function and as a macro defined in the header. Normally, the macro version is used. To obtain the library
function, either use a to remove the macro definition or, if compiling in ANSI C mode, enclose the function name in parenthesis or take its
address. The following examples use the library function for
or
The following example use the library function for
EXTERNAL INFLUENCES
Locale
The category determines the translations to be done.
International Code Set Support
Single-byte character code sets are supported.
AUTHOR
was developed by IBM, OSF, and HP.
SEE ALSO
ctype(3C), getc(3S), setlocale(3C), lang(5), thread_safety(5).
STANDARDS CONFORMANCE
conv(3C)