Mielenkiintoinen artikkeli. Kannattaa luke. 11 kuuluisaa ohjelmistobugia kautta aikain. Tuon läpiluettua lopettaa puheet siitä, että ihminen pystyisi muka kehittelemään virheettömiä sovelluksia ja käyttöjärjestelmiä
http://www.computerworld.com/s/article/9183580/Epic_failures_11_infamous_software_bugs?taxonomyId=18&pageNumber=1
Aika vaatimattomia vaikutukseltaan nämä Mikkisotkunkin bugit tähän mennessä ovat olleet:
"More math bugs
Intel's Pentium flaw wasn't the only math-related bug to cause a PR disaster. These two had Microsoft execs red in the face:
Windows Calculator 3.x: In 1994, a bug in CALC.EXE came to light that had quietly been kicking around since Windows 3.x first appeared in 1990. Propellerheads had fun subtracting 2.1 from 2.11 in Windows Calculator and getting an answer of not 0.01, but 0.00.
Excel 2007: Ask people with calculators or slide rules to multiply 850 x 77.1, and they'll answer 65,535. But in September 2007, it was discovered that Excel 2007 answered 100,000. According to Microsoft, this bizarre rounding-up occurred only in calculations that resulted in 65,535 or 65,536. What's more, Excel actually calculated the correct answer, but a bug prevented it from displaying properly."
http://www.computerworld.com/s/article/9183580/Epic_failures_11_infamous_software_bugs?taxonomyId=18&pageNumber=1
Aika vaatimattomia vaikutukseltaan nämä Mikkisotkunkin bugit tähän mennessä ovat olleet:
"More math bugs
Intel's Pentium flaw wasn't the only math-related bug to cause a PR disaster. These two had Microsoft execs red in the face:
Windows Calculator 3.x: In 1994, a bug in CALC.EXE came to light that had quietly been kicking around since Windows 3.x first appeared in 1990. Propellerheads had fun subtracting 2.1 from 2.11 in Windows Calculator and getting an answer of not 0.01, but 0.00.
Excel 2007: Ask people with calculators or slide rules to multiply 850 x 77.1, and they'll answer 65,535. But in September 2007, it was discovered that Excel 2007 answered 100,000. According to Microsoft, this bizarre rounding-up occurred only in calculations that resulted in 65,535 or 65,536. What's more, Excel actually calculated the correct answer, but a bug prevented it from displaying properly."
Vastaukset 4
Vanhimmat
http://www.computerworld.com/s/article/9183580/Epic_failures_11_infamous_software_bugs?taxonomyId=18&pageNumber=4
...löysi piraatteja joka nurkasta ja puutarhasta...
"In that task, it was as vigilant as, well, a vigilante. In fact, in late-August 2007, it found piracy everywhere it looked -- even among thousands of legitimate Windows customers. "
laski sinänsä oikein tuloksen mutta esti näytölle tulostuvan tuon oikean lopputuloksen.
"According to Microsoft, this bizarre rounding-up occurred only in calculations that resulted in 65,535 or 65,536. What's more, Excel actually calculated the correct answer, but a bug prevented it from displaying properly."
"Petrov ordered his men to stand down, and 15 minutes later, radar outposts confirmed that there were no incoming missiles. The decision took less than five minutes, it was confirmed within half an hour, and the world remained at peace.
When the early-warning system was later analyzed, it was found to have more bugs than a suburban compost heap -- which meant that although Stanislaus Petrov had saved the world, he'd made a serious error of judgment: He had shown up the incompetence of Soviet programmers.
This was not good for morale, or for the lieutenant colonel. He was cold-shouldered into an early retirement and was largely unsung until May 21, 2004, when a San Francisco-based organization called the Association of World Citizens bestowed its highest honor -- world citizenship -- and a financial reward on him."
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Näin jälkeenpäin jutulle voisi jopa naureskella, mutta mutta...huh huh..
Ja kyllähän se niin oli, että Neuvostoliiton merivoimien korkea-arvoisen upseerin terve järki Kuuban kriisin aikaan pelasti jo aiemmin maailman täydeltä tuholta. Jos tuo upseeri (nimeä en nyt muista) olisi totellut annettuja määräyksiä kirjaimellisesti mekään ei tällä palstalla sodittaisi.
maininta myös Wikipediassa.
http://en.wikipedia.org/wiki/Stanislav_Petrov
Stanislav Yevgrafovich Petrov (Russian: Станислав Евграфович Петров) (born c. 1939) is a retired lieutenant colonel of the Soviet Air Defence Forces who deviated from standard Soviet protocol by correctly identifying a missile attack warning as a false alarm on September 26, 1983.[1] This decision may have prevented an accidental retaliatory nuclear attack on the United States and its Western allies. Investigation of the satellite warning system later confirmed that the system had malfunctioned.