Calculator Features

Off-Topic
1

What features are “must haves” for you in a “calculator app” (be it on a desktop, or an iPhone)… and what features have you seen that you thought were just a plain waste of programming effort?

and yes I know, there are hundreds (if not thousands) of existing apps… so there is still room for more :slight_smile:

2

If it doesn’t at least have the capability of the TI30XIIS its useless on an iPhone IMO.

3

things I need:

  • dec -> hex /hex -> dec
    • / x - (basic arthimatic)
  • sin / cos / tan
  • 1/x, x^y, sqrt

nice to have:

  • AND/OR/XOR
  • dec -> bin, bin -> dec, hex -> bin, bin -> hex
  • formulas (ability to type in a formula to be able to solve for it).
  • ability to see past results (like looking at the tape roll of an oldschool paper calculator that accounts used to use).
4

Scott… so far my design has everything you mentioned, except formulas
Jason… guess I’ll have to look up that calculator

5

RPN

6

Never understood the appeal of RPN, although it is necessary internally to properly process infix entry… So that too is already a planned feature :slight_smile:

So far, I’ve only missed one mentioned feature :slight_smile:

7

[quote=431993:@Dave S]Scott… so far my design has everything you mentioned, except formulas
Jason… guess I’ll have to look up that calculator[/quote]
I am easy when it comes to my calculators.

8

LOL… me… I’m just easy… not free… but easy :slight_smile:

Do you have a link to a calcualtor app that does do what you suggested? Maybe I can steal an idea or two

9

Its actually not required but does make life simpler

10

Oh I understand that it is needed “internally” to convert infix to postfix (rpn) to support the calculator “engine”… so bypassing the infix as an option is not a big issue to do

11

Its one way to evaluate expressions
Certainly not the only way
Its possible to evaluate infix expressions without converting them to other forms