README

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GNU FUSSY


The GNU _fussy_ program implements a scripting language with an algorithm
for automatic error propagation of random measurement errors in an
arbitrary mathematical expression. The program can be used a simple
interactive calculator with error propagation. Mathematical expressions
can be implemented as a collection of sub-expressions, as sub-program
units (functions or procedures) or as single atomic expressions.
Sub-expressions can be assigned to temporary variables which can then be
used to write the final expression. The interpreter is internally
implemented as a virtual machine for efficient runtime performance and
can be used as an interpreter in a client code as well. A simple C
binding to the interpreter is also provided.

The syntax of _fussy_ is similar to that of C programming
language. It is easy, particularly for those familiar with programming
in C, to use _fussy_ with minimal learning. In its simplest form,
_fussy_ interpretor can be used interactively as a simple calculator
with the added feature of automatic error prograpation (see syntax for
simple expressions, sub-expressions, and functions/procedure).


Installation
------------

The installation instructions in the INSTALL file should work for most
GNU Linux-type OS distributions.  However if "./configure && make
check" does not work for you, please try just running "./build".  The
"build" script is distributed with GNU fussy.



IF YOU FIND THE SOFTWARE USEFUL, WE LOOK FORWARD TO HEARING FROM YOU
WITH YOUR COMMENTS/SUGGESTIONS.

PLEASE ALSO REFER TO ITS USAGE IN YOUR PUBLICATION BY QUOTING THE
FOLLOWING:

-   Project homepage:
         https://www.gnu.org/software/fussy

-   Code reposatories:
         https://savannah.gnu.org/projects/fussy
         HTTPS://GITHUB.COM/SANBEE/FUSSY

-   GNU fussy manual:
         https://www.gnu.org/software/fussy/manual

-   Web-paper: 
         HTTP://SANBEE.GITHUB.IO/FUSSY/HTML/FUSSY.HTML