BUG in Windows Calc [modified]

[NMehta83]

Follow the procedure click '4' click 'sqrt' click '-'(Minus sign) click '2' ('-8.1648465955514287168521180122928e-39') click '+' click '2' Answer should be 2 and It shows 2 only :~

NMehta83 “We cannot fail until we fail to try”

[Hiren solanki]

It's hard to give you 5 . :laugh:

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Hiren Solanki.
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"You will always find me near 127.0.0.1"

[Dalek Dave]

Give him a 4.958468546513654646854968435146814612321687 instead.

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[NMehta83]

For this answer i will give you +5 :laugh:

NMehta83 “We cannot fail until we fail to try”

[Bassam Abdul Baki]

Clicking the 5 is hard for you?

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[Hiren solanki]

It takes half and hour to reach to rating link. :laugh:

Rating is Always appreciated.
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Hiren Solanki.
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"You will always find me near 127.0.0.1"

[Dalek Dave]

Amd yet you haven't!

------------------------------------ I will never again mention that I was the poster of the One Millionth Lounge Post, nor that it was complete drivel. Dalek Dave CCC League Table Link CCC Link[^]

[Hiren solanki]

NMehta83 wrote:

i will give you +5

It's 10 minute already, still not deposited :laugh:

Rating is Always appreciated.
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Hiren Solanki.
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"You will always find me near 127.0.0.1"

[NMehta83]

Now have my another +5 :laugh:

NMehta83 “We cannot fail until we fail to try”

[Hiren solanki]

Looks like windows support person. take a 5.

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Hiren Solanki.
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"You will always find me near 127.0.0.1"

[NMehta83]

I was laughing so i forgot...but now you can check :)

NMehta83 “We cannot fail until we fail to try”

[leppie]

I already said that... (but -2, same thing however).

((λ (x) `(,x ',x)) '(λ (x) `(,x ',x)))

[NMehta83]

nah!!!!!! After your post just playing with calc and got that. :)

NMehta83 “We cannot fail until we fail to try”

[Khaniya]

Dalek Dave wrote:

Or -4!

why DD? can you explain?

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[Rhuros]

On Windows 7 In Standard Mode you get: -1.068281969439142e-19 In Scientific Mode you get: -8.1648465955514287168521180122928e-39

[Lost User]

The square root of 4 is either 2 or -2. -2 - 2 = -4.

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[peterchen]

Actually, Calc internals have been replaced (around XP) with a long numbers library, so it is somehow noteworthy that this isn't enough. OTOH, the OP failed to notice tha 8e-39 is zero enough when playing around with square roots of 2.

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[leppie]

peterchen wrote:

OTOH, the OP failed to notice tha 8e-39 is zero enough when playing around with square roots of 2.

And that is why I cleverly did not point out who the FAILER actually was ;P

((λ (x) `(,x ',x)) '(λ (x) `(,x ',x)))

[QuiJohn]

peterchen wrote:

Actually, Calc internals have been replaced (around XP) with a long numbers library, so it is somehow noteworthy that this isn't enough.

I actually thought I heard it referred to as an "infinite precision" calculator. I've tested it before on values that would make the pre-XP calc choke, but apparently it's not infinite. Ah, googled it... apparently "arbitrary" precision is what it's called. I think MS changed it in the wake of that idiotic, much publicized and ultimately harmless Pentium "floating point" bug. People kept thinking they were finding more bugs, but they were just running into typical floating point inaccuracies.

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[Dan Neely]

leppie wrote:

Another fails the knowledge about floating point.... When will they ever learn?????

... not until this[^] (What Every Computer Scientist Should Know About Floating-Point Arithmetic) is added to the standard curriculum. :sigh: :sigh:

3x12=36 2x12=24 1x12=12 0x12=18