| 词条 | 9999 (number) |
| 释义 |
| number = 9999 | roman = M{{Overline|X}}CMXCIX or {{Overline|IX}}CMXCIX }} Nine thousand nine-hundred ninety-nine (9999) is the natural number following 9998 and preceding 10000. 9999 is an auspicious number in Chinese folklore. Many estimations of the rooms contained the Forbidden City point to 9999. Chinese tomb contracts often involved being buried with 9999 coins, relational notion to Joss paper, as it was believed the dead would need that amount to buy the burial plot from the Earth goddess.[1] 9999 is also the emergency telephone number in Oman.[2] Mathematics9999 can be used as a divisor to generate 4-digit decimal recurrences. For example, 1234 / 9999 = 0.123412341234... . 9999 is a Kaprekar number.[3] Computer and software9999 was the last possible line number in some older programming languages such as BASIC.[4] Often the line "9999 END" was the first line written for a new program. Some very old software used "9999" as end of file, however no problems occurred September 9, 1999[5] VideogamesThe King of Fighters character K9999 has the number on his name, although it is read as "kay-four-nine" References1. ^Valerie Hansen, Negotiating Daily Life in Traditional China: How Ordinary People Used Contracts, 600-1400 (Yale University Press, 1995) {{DEFAULTSORT:9999 (Number)}}{{Number-stub}}2. ^(http://www.rop.gov.om/english/regionalinfo.asp {{Webarchive|url=https://www.webcitation.org/6ASXf1f1T?url=http://www.rop.gov.om/english/regionalinfo.asp |date=2012-09-05 }}) 3. ^{{Cite web|url=https://oeis.org/A006886|title=Sloane's A006886 : Kaprekar numbers|website=The On-Line Encyclopedia of Integer Sequences|publisher=OEIS Foundation|access-date=2016-06-03}} 4. ^{{Citation | last = Ordman | first = Edward | title = Writing Transportable BASIC Part 1 | journal = COMPUTE! | issue = 32 | pages = 26 |date=January 1983 | url = http://www.atarimagazines.com/compute/issue32/015_1_PART_I_WRITING_TRANSPORTABLE_BASIC.php }} 5. ^{{cite web |url= https://www.wired.com/2011/09/0909090999-not-computer-problem/ |title= Sept. 9, 1999: 9/9/99 No Big Deal for Computers |access-date = 19 November 2017 |last= Alfred |first= Randy |date= 9 September 2011 |website= Wired |quote= Conversely, at least one expert worried that the real problem wasn’t in the date being interpreted as an end-of-file marker (or trailer), but in an end-of-file marker being interpreted as a date. |publisher= Wired |archive-url= https://web.archive.org/web/20140601032219/https://www.wired.com/2011/09/0909090999-not-computer-problem/ |archive-date= 1 June 2014}} 1 : Integers |
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