ABOUT:
------

TOUPPER converts text from lowercase to uppercase. It leaves all
other characters as they are (such as punctuation, numbers, etc.)

TOLOWER converts text from uppercase to lowercase. It leaves all
other characters as they are (such as punctuation, numbers, etc.)


HOW TO USE:
-----------

These are very simple programs, and they do not read files on
their own. Instead, you need to use file redirection from the
command line, like this:

TOUPPER < file.txt > upper.txt

or:

TOLOWER < file.txt > lower.txt


TO COMPILE:
-----------

WCL -0 -os tolower.c

..then rename tolower.c to toupper.c and change the two lines
inside the while() loop to read:

if (is_lower(ch)) {
  putchar( to_upper(ch) );

..and recompile using:

WCL -0 -os toupper.c


LICENSE:
--------

These are trivial programs, and as such any first-year computer
science student could write them. I claim no copyright on these
programs and release them into the public domain.

For regions where "public domain" is not recognized, you may use
the "Creative Commons Zero" or CC0 as "No rights reserved":

https://creativecommons.org/share-your-work/public-domain/cc0/


AUTHOR:
-------

Jim Hall <jhall@freedos.org>
Oct 28 2022

