iOS 4 calculator giving wrong answers

[Mark R]

I don't recall the iPhone OS 3 calculator having this bug.

It seems that under some circumstances, the exponent of a floating point number overflows/underflows without triggering an error condition, or rounding to zero.

E.g. 1e-60 ^ 2 is evaluated as 1e+136.

Which is incorrect by a rather impressive 256 orders of magnitude.

 

[mmntech]

Well, I can safely say I never would have found that.

 

[aphex]

(the sound of an airplane flying over my head)

My iPhone calculation usually involves 1st grade math

 

[AtlantaBob]

Am I missing something? I can't even find a way to use exponents in the iOS 4 calculator? The absence of that ability makes it really complex to even do that calculation in the first place....

 

[aphex]

Am I missing something? I can't even find a way to use exponents in the iOS 4 calculator? The absence of that ability makes it really complex to even do that calculation in the first place....

Turn your phone on its side

 

[Leros]

I get the same thing.

Floating point is fun

 

[thescreensavers]

I get 1E-120 on my Droid

Isnt there another calc app in the App store?

 

[Tegeril]

File a bug. http://bugreporter.apple.com

If it's reproducible, they'll fix it if possible.

 

[marketsons1985]

Technically still correct....

Just saying.

Seems that 1 is the only problematic number.

 

[MagnusTheBrewer]

So, let me get this straight, are you nerds telling me you no longer use calculators?

 

[Kaido]

File a bug. http://bugreporter.apple.com

If it's reproducible, they'll fix it if possible.

A Bumper will fix it.




:awe:

 

[mugs]

So, let me get this straight, are you nerds telling me you no longer use calculators?

Who said that?

 

[TheStu]

You should get the slide rule app!

Or, the HP calculator app that does reverse polish.

 

[Mark R]

File a bug. http://bugreporter.apple.com

If it's reproducible, they'll fix it if possible.

The bug reporter doesn't work for me.
I just get a message saying - you are not authorized to use the bug reporter tool. Call extension 7777 for assistance.

 

[KeypoX]

something like that couldnt be used to jailbrake?

 

[Kadarin]

I don't recall the iPhone OS 3 calculator having this bug.

It seems that under some circumstances, the exponent of a floating point number overflows/underflows without triggering an error condition, or rounding to zero.

E.g. 1e-60 ^ 2 is evaluated as 1e+136.

Which is incorrect by a rather impressive 256 orders of magnitude.

Clearly you're holding it wrong... :awe:

 

[Tegeril]

Looks like the bug reporter is down

Let me file a bug about it...

 

[SexyK]

I get 1e+120 on my iPhone 4

 

[mugs]

I get 1e+120 on my iPhone 4

You probably did 1e+60^2, not 1e-60^2

I did that on my iPhone 4 and got NaN. I also tried it on my 3G running iOS 4 and got NaN