Making a scientific calculator: examples?

[ratty]

Are there any examples of calculator programs made with MMF? I want to customize one a bit to speed some things up. I'm just wondering what considerations need to be taken into account because, well, there's always sneaky things that come up.

[schrodinger]

You want to create a calculator completely from scratch (building your own functions to add, sub, multiply etc.)
or "simply" using built-in expression editor capabilities with a handy GUI to operate with?

I'm sure sneaky things would come up even in the second situation,
but they're always hard to foresee - you'll maybe better just jump in and see what happens

I remember seeing others asking in the forum for similar jobs but never seen a built example,
don't know if anyone got to finish those projects.

[King_Cool]

Not sure how much this will help...
I actually created a "basic" Calculator out of boredom not long ago, should have it lying around. Never finished it as focus shifted to other things.
It is not complete, and only does multiplications if i remember correctly.

I divided the process of creating the Calculator into 2 rough parts:
- Code to accomodate for correct syntax of User input ( User can for example not imput something silly like "3,,3++-4" )
- Create seperate code for each Operator ( addition, subtraction, multiplication, division ), that #1 scans the Input ( String ) and identifies the first Operator and #2 solves the calculation and replaces the specific part of the String with the result

Involves alot of FastLooping through a String...

[ratty]

Involves alot of FastLooping through a String...

This does help! I'm assuming the inbuilt calculations didn't quite make the cut? Just pasting a proper calculation string into the editor, for example?

[King_Cool]

I...
#1 Identified an Operator ( say division operator )
#2 Extracted the numbers to the Left and Right of it
#3 Used the built in Expression Editor to do the calculation on the Extracted numbers

If this answers you question, im not sure