Integer overflow: Difference between revisions

Revision as of 06:55, 1 November 2015

Revision as of 23:07, 19 November 2015

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On 30 April 2015, the [[Federal Aviation Authority]] announced it will order [[Boeing 787]] operators to reset its electrical system periodically, to avoid an integer overflow which could lead to loss of electrical power and [[ram air turbine]] deployment, and Boeing is going to deploy a [[software update]] in the fourth quarter.<ref>{{cite news |title= F.A.A. Orders Fix for Possible Power Loss in Boeing 787 |work= [[New York Times]] |date= 30 April 2015 |url= http://www.nytimes.com/2015/05/01/business/faa-orders-fix-for-possible-power-loss-in-boeing-787.html?_r=0}}</ref> The [[European Aviation Safety Agency]] followed on 4 May 2015.<ref>{{cite web |url= http://ad.easa.europa.eu/ad/US-2015-09-07 |work= Airworthiness Directives |title= US-2015-09-07 : Electrical Power - Deactivation |date= {{date|2015-05-04}} |publisher= [[European Aviation Safety Agency]]}}</ref> The error happens after 2³¹ centiseconds ({{#expr:2^31/100/3600/24}} days), indicating a 32 bit [[Signed number representations|signed]] [[Integer (computer science)|integer]].

WhenIt [[Donkeyis Kong]]impossible breaksto onprogress past level 22 itof isthe arcade game [[Donkey Kong]] because of an integer overflow in its time/bonus. Donkey Kong takes the level number you're on, multiplies it by 10 and adds 40. When you reach level 22 the time/bonus number is 260 which is too large for its 8-bit 256 value register so it resets itself to 0 and gives the remaining 4 as the time/bonus - not long enough to complete the level.

In [[Donkey Kong Jr. Math]], when you try to calculate a number over 10000, it only shows the first 4 digits.