https://github.com/erkin/rpnscm

CLI RPN calculator with REPL and batch evaluation support
https://github.com/erkin/rpnscm

calculator chicken-scheme lisp rpn rpn-calculator scheme

Last synced: 27 days ago
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CLI RPN calculator with REPL and batch evaluation support

• Host: GitHub
• URL: https://github.com/erkin/rpnscm
• Owner: erkin
• License: mpl-2.0
• Created: 2018-04-19T13:05:26.000Z (almost 7 years ago)
• Default Branch: master
• Last Pushed: 2019-07-09T21:14:03.000Z (over 5 years ago)
• Last Synced: 2024-11-14T23:34:15.942Z (3 months ago)
• Topics: calculator, chicken-scheme, lisp, rpn, rpn-calculator, scheme
• Language: Scheme
• Homepage:
• Size: 67.4 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 4
• Metadata Files:
  • Readme: README.org

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README

        
* RPNSCM v0.18

  A primitive (but future-rich in near future, probably) RPN calculator written in Scheme.

  Check the development branch for latest stuff.

  This is effectively a toy project for me to hack with CHICKEN Scheme.

** Required extensions

   * =srfi-1=  (for =zip=)

   * =srfi-13= (for =string-pad=, =string-pad-right= & =string-tokenize=)

   * =srfi-37= (for =args-fold= & =option=)

** Usage

   #+BEGIN_EXAMPLE

   rpn -e "EXPRESSION"

   #+END_EXAMPLE

   See =--help= for options and =--operators=

   for a list of operations (and what they do).

*** Example

    #+BEGIN_EXAMPLE

    % ./rpn -e "4 3 % 7 7 * * 2 / 10 -" 

    (14)

    % ./rpn -i

    5 5 +

    8 2 *

    !

     16

    ^D

    (10)

    % ./rpn -v -e "4 3 % 7 7 * * 2 / 10 -" 

    Input: (4 3 % 7 7 * * 2 / 10 -)

     0: (3 % 7 7 * * 2 / 10 -) -> 4 -> ()

     1: (% 7 7 * * 2 / 10 -) -> 3 -> (4)

     2: (7 7 * * 2 / 10 -) -> % -> (4 3)

     3: (7 * * 2 / 10 -) -> 7 -> (1)

     4: (* * 2 / 10 -) -> 7 -> (1 7)

     5: (* 2 / 10 -) -> * -> (1 7 7)

     6: (2 / 10 -) -> * -> (7 7)

     7: (/ 10 -) -> 2 -> (49)

     8: (10 -) -> / -> (49 2)

     9: (-) -> 10 -> (24)

    10: () -> - -> (24 10)

    Output: (14)

    #+END_EXAMPLE

** Note

   Only integers are supported for the time being.

   Inexact numbers get rounded to the nearest exact integer.