為什麼Programmer無法分清萬聖節和聖誕節

作者: yauhh (喲) 看板: Programming
標題: Re: [問題] 為什麼Programmer無法分清萬聖節和聖誕節
時間: Sun Apr 26 19:35:51 2009

※ 引述《bc5678 ( )》之銘言：
: 摘自 Expert C Programming - Deep C Secrets中的一段
: Like the Potrzebie system, the joke about programmers' confusion over
: Halloween and Christmas Day depends on inside knowledge of numbering systems.
: The reason that programmers can't tell Halloween from Christmas Day is
: because 31 in octal (base eight) equals 25 in decimal (base ten). More
: succinctly, OCT 31 equals DEC 25!
: When I wrote to Professor Knuth asking his permission to tell the story, and
: including a draft copy of the chapter, he not only agreed, he marked numerous
: proofreading improvements on the text, and pointed out that programmers can't
: distinguish NOV 27 from the other two dates, either
: 來源: http://my.safaribooksonline.com/0131774298/ch08


: OCT 31和 DEC 25的關係是很清楚
: 不過Knuth講的NOV 27就看不出端倪了, 上面兩個跟感恩節有啥關係
: 難道是念數學的人才看得懂的joke?

英文月份 October 本來應是8月, November 9月, December 10月
OCT 31 = Nov 27 = DEC 25,
因為八進位31和十進位25換算為九進位,就是27.

--
話說十進位25唸成「二十五」,那麼八進位31是否該唸成「三八一」?
--
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