Copyright 2001 Free Software Foundation, Inc.

This file is part of the GNU MP Library.

This program is free software; you can redistribute it and/or modify it under

the terms of the GNU General Public License as published by the Free Software

Foundation; either version 3 of the License, or (at your option) any later

version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY

WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A

PARTICULAR PURPOSE.  See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with

this program.  If not, see https://www.gnu.org/licenses/.

                   DEMONSTRATION CALCULATOR PROGRAM

This is a simple program, meant only to show one way to use GMP with yacc

and lex to make a calculator.  Usage and comments on the implementation can

be found in calc.y.

Within a GMP build tree, the generated Makefile can be used to build the

program,

	make calc

(or on a DOS system, "make calc.exe").

Elsewhere, once GMP has been installed, the program can be compiled with for

instance

	gcc calc.c calclex.c -lgmp -o calc

Or if GNU readline is used then

	gcc calc.c calclex.c calcread.c -lgmp -lreadline -o calc

(again, on a DOS system "-o calc.exe").

Readline support can be enabled or disabled in calc-config.h.  That file is

created by the GMP ./configure based on the --with-readline option.  The

default is --with-readline=detect, which means to use readline if available.

"yes" can be used to force it to be used, or "no" to not use it.

The supplied calc.c was generated by GNU bison, but a standard yacc should

work too.

The supplied calclex.c was generated by GNU flex, but a standard lex should

work too.  The readline support may or may not work with a standard lex (see

comments with input() in calcread.c).  Note also that a standard lex will

require its library "-ll" on the compile command line.  "./configure" sets

this up in the GMP build tree Makefile.

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