[nasser]

Name: bc (Basic Calculator.. Bench Calculator)

Description: Command line based arbitrary precision calculator language, with syntax similar to C. Can be used as interactive shell or as scripting language.

History: Originally designed as a front end to dc (Desk Calculator) which used reverse polish notation.

Authors: Robert Morris and Lorinda Cherry (Unix version, 1975), Philip Nelson (GNU version, 1991)

Version: 1.06.95-9 (2014)

Porting: From Debian Armel Wheezy repository

Library dependencies: libtinfo.so.5, libreadline.so.6

Works on: possibly all kindles. tested ok on pw1, pw3 and kt3.

Needs: Jailbroken Kindle with kterm installed

Features:

• - Arithmetic operators
• - Increment and decrement operators
• - Assignment operators
• - Comparision or Relational Operators
• - Logical or Boolean operators
• - Math Functions
• - Conditional statements
• - Iterative statements
• - Functions

Instructions:

• Unzip attached file bc-kual.zip into /mnt/us/extensions
• Select bc from KUAL menu
• In the kterm window do as explained below
• Try ./sier.sh to generate text mode sierpinski triangles

Usage:

• - On the command line, like echo "1+2"|bc.
• - Interactively, by entering bc first.. then 1+2. Exit by entering quit.
• - By entering commands into a file.. then by entering bc < <filename>
• - Also, scripts containing functions can be loaded as parameters and the functions defined in these scripts will then be available in interactive or CLI mode.
• - There is a built-in library which is included by entering bc -l.

There is a detailed syntax using bases, scales, variables, operators, expressions, statements and functions.
See screenshots showing brief help and limits, pi calculated to 2000 places and a text mode Sierpinski fractal!
For more instructions and examples, see manual(inside zip) and links below.

Links:

• https://www.gnu.org/software/bc/manu...l_mono/bc.html (GNU bc Command Manual)
• https://en.wikipedia.org/wiki/Bc_(programming_language) (wikipedia entry)
• http://phodd.net/gnu-bc/ (collection of bc functions)
• http://marcmmw.freeshell.org/esp/programacion/bc.html (spanish page explaining bc usage)
• http://www.numbertheory.org/gnubc/gnubc.html (usage of bc for number theory)
• http://x-bc.sourceforge.net/index.html (gui to bc with additional extensions)
• http://www.folkstalk.com/2012/09/bc-...nix-linux.html (usage examples)
• https://www.mkssoftware.com/docs/man1/bc.1.asp (manual)
• http://www.basicallytech.com/blog/ar...ions-using-bc/ (calculation examples)
• http://perso.ens-lyon.fr/philippe.theveny/cise.pdf (instructive paper on how arbitrary precision is required in certain cases)

Attachments:

• - bc-kual.zip (executable, library files and sample scripts ready for loading into KUAL, user manual in text format)
• - screenshots (brief help + limits, pi calculated to 2000 places, Text mode Sierpinski fractal)