Short:    Postfix Expression Calculator
Author:   Daniel Charles Kovacs
Uploader: dkovacs@cyberbeach.net
Type:     misc/math

This is a semi-functional postfix expression calculator for Amigados.

What is postfix?

The opposite of infix ;)

Postfix expressions are written differently than regular expressions, but we
have all done them in the past (as early as grade 1).  Here is what I mean:

Normal (infix) math:

   2 + 2 = 4

Postfix
  
    2
   +2
   --
    4

Operations always follow the numbers.  Consider this evaluation:

   (3+4)*(2+3) = 35

it would be written in postfix (for the this program)

3 4 add 2 3 add mul

The program offers the following operations:

add, subtract, multiply, divide (with zero-checking), negate, absolute
value, sine, cosine, tangent, inverse tangent, and PI.


Usage:

Double click on the postfix icon.  A window will open awaiting your input,
type help and press enter to get a list of operations.  Type quit to exit
the calculator, show to display the result and clear to empty the stack.


Distribution:

Give it to anyone, except not for money.

Contact:

Daniel Kovacs
106 Main St.
Lion's Head
Ontario Canada
N0H 1W0

(519) 793 4431
(705) 523 0899

dkovacs@cyberbeach.net
http://www.cyberbeach.net/~dkovacs


============================= Archive contents =============================

Original  Packed Ratio    Date     Time    Name
-------- ------- ----- --------- --------  -------------
   28392   11358 59.9% 04-Apr-98 11:22:16  PostFix
    1263     731 42.1% 04-Apr-98 11:53:40  postfix.readme
-------- ------- ----- --------- --------
   29655   12089 59.2% 05-Apr-98 19:15:36   2 files