[ANN] Simple RPN Calculator on RevOnline

[DunbarX at aol.com]

Andre.

Andre.

As a reverse Polish afficionado from the days of the HP-35, I have to tell 
you that the following sequence fails:

1- Key in a 6
2- Enter
3- Key in a 5
4- Key in "-" (minus)

In an RPN calculator, the enter key terminates data entry, and the next 
argument (or operand) is loaded for immediate action. This is operator postfix 
notation. I am sure you know this.

Your minus sign correlates to a "change sign" key on an HP calculator. I 
cannot do a subtraction at all. A bug? Or me? But a gorgeous little 
calculator. Did you ever see, and I forget which model it was, an HP with all four 
stack registers ("X", "Y", "Z", and "T") visible at once in a four line 
display? Must have been about 1980 or so. You can watch as you build and collapse 
the registers as you work a multi-level calculation.

Regards,

Craig Newman


In a message dated 10/13/10 1:18:30 PM, andre at andregarzia.com writes:


> Folks,
> 
> I've decided to share my little RPN Calculator on RevOnline.
> 
> http://revonline2.runrev.com/download/stack/518/RPN-Calc
> 
> It is quite simple and it has a minimalistic stack (the data structure, 
> not
> the file format) implementation on the stack script. I am quite fond of 
> this
> little piece. It was quick to implement, I find it pleasing to the eye and 
> I
> use it as my default calc on linux
> 
> Andre
>