I haven't tried coding for iOS or Android but I hear what you say about
the complexity of Calculator design.

I have coded emulations of several HP models in the past and it was an eye
opening experience. Especially good at teaching you the short comings of
the Float Type  in most languages. I reverted to performing BCD Arithmetic
like HP did in most of their models.

I bought the DVD set from the HP Calculator Museum and it was a great help.





On 5 April 2013 12:54, Tamas Rudnai <tamas.rudnai@gmail.com> wrote:

> Thank you!
>
> Well, a simple four function calculator is one of the most popular type o=
f
> projects for picking up iOS development. Adding newer and newer features
> just makes the whole lot complicated by the end. At first I thought this
> will be super easy, then ended up fairly complex code. However the most
> difficult I have found was to design it, what functions to include, how t=
o
> arrange the buttons yet to keep it relatively simple to use. And of cours=
e
> endless hours of bug fixing and polishing the user experience. Now I have=
 a
> different respect to calculator manufacturers like TI and HP :)
>
> To pick up iOS development the best I have found is to subscribe to one o=
f
> the free courses on iTunes U (iTunes University). You can follow lessons
> from Stanford for example on your Mac or iPad or iPhone even. That teache=
s
> you Objective C as well as the architectures and the API and a bit more. =
It
> is good fun :)
>
> Tamas
>
> Sent from my iPad
>
> On Apr 4, 2013, at 10:58 PM, Scott <goldscott@gmail.com> wrote:
>
> > Just downloaded and played with the app a bit. Great features for a
> software/electrical engineer. Thank you!
> >
> > How difficult was it to build? I've been interested in iOS development
> for a while now but haven't jumped in yet.
> >
> > -Scott
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