blocks|key|3301859|text|它就是这样，基于这一假设而构建的软件的巨大重量意味着它将存在一段时间。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3301860|我的观点是，这是C语言的错误，所有其他Johnie新出现的语言都符合这一点。|3301861|你会从不了解情况的人那里得到一些有趣的情况。我们的团队发现的为数不多的Y2K错误之一是一个网站自豪地宣布年是19100，因为他们在struct+tm年前面加上了字面上的"19“。|offset|length|style|CODE|3301862|entityMap^0|0|0|1T|9|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|M|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|N|8|@$F|O|G|P|H|I]]|9|@]|A|$]]|$1|J|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|K|$]]

It is what it is, and the huge weight of software built to that assumption means it's going to be around for a while.

My opinion is that it was the fault of C, and all those other Johnie-come-lately languages just conformed with it.

You get some funny situations from people who don't know better. One of the few Y2K bugs our team found was a web site proudly proclaiming the year was 19100 simply because they prefixed the <code>struct tm</code> year with the literal "19".

blocks|key|3088933|text|使用零开始计数实际上是汇编程序员的一个优化技巧。它们不是将1赋给计数寄存器，而是将寄存器与自身进行XOR运算，这在CPU周期中稍微快一些。这意味着计数将从0开始，并且将始终达到元素的长度，不包括最后一个元素。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3088934|此外，零的使用在指针算术中也很流行，在指针算术中，您将使用一个指向某个已分配内存的基指针，外加一个位于该基指针的偏移量的指针。在这里，使用值0将偏移量指向内存块的基址非常有意义。(一般的数组逻辑往往是基址加上偏移量x记录大小。)|3088935|和从零开始的月份数字？通常，许多编程环境将数据计算为自某些默认数据以来的天数。1899年12月31日是一个很受欢迎的日期，尽管还有很多其他日期被用作基准日期。所有其他日期都从这个基数偏移，并将仅存储为一个单独的数字。分数将用于表示小时、分钟和秒，其中0.25将是24/4+=6小时。因此，要将日期转换为实际日期，环境所需做的就是将此数字转换为实际日期。|3088936|但是，从零开始的数组和从1开始的月份值的组合确实会带来问题。要获取月份9的月份名称，必须从month数组中获取项目8。一些开发人员会很高兴在得到它的名字之前减少月份数字。其他人更喜欢把月份改成从零开始的，因为人们只想知道名字，而不是数字。这是我个人的观点。|3088937|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|L|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|M|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

The use of zero to start counting is actually an optimization trick from Assembly programmers. Instead of assigning 1 to the count register, they XOR'ed the register with itself, which was slightly faster in CPU cycles. This meant that counting would start with 0 and would always be up to the length of elements, excluding the last one.

Also, the use of zero is also popular with pointer arithmetics where you would use one base pointer pointing at some allocated memory, plus a second pointer which would be at an offset from this base pointer. Here, using the value zero makes a lot of sense to point the offset to the base of the memory block. (General array logic tends to be the base address plus the offset x record size.)

And zero-based month numbers? Often, many programming environments calculate the data as a number of days since some default data. December 31, 1899 is a popular date, although there have been plenty of other dates used as base date. All other dates are offset from this base, and will just be stored as one single number. Fractions would be used to indicate hours, minutes and seconds, where 0.25 would be 24/4 = 6 hours. Thus, to transform a date into a real date, all the environment has to do is transform this number into a real date.

However, the combination of zero-based arrays and 1-based month values does bring a problem. To get the month name of month 9, you would have to get item 8 from the month array. Some developers would be happy with decreasing the month number before getting it's name. Others preferred to change the month into something zero-based since people just want to know the name, not the number. It's a personal view.

Some popular programming languages use month numbering which is off by 1 -- JavaScript comes to mind, as does Java, and if memory serves, C is another. I have some questions:

<ul>
<li>If you are going to be ignoring the month numbering used by laypeople, then why not for the sake of consistency also ignore the day numbering used by laypeople, and number the days in each month starting from 0 ?</li>
<li>Why is this so common?</li>
<li>Whose idea was this in the first place?</li>
</ul>

Zero-based month numbering

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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一些流行的编程语言使用的月份编号与1相差1 -- JavaScript出现在我的脑海中，Java也是如此，如果内存有效的话，C是另一种。我有几个问题：如果你打算忽略外行使用的月份编号，那么为了保持一致性，为什么不忽略外行使用的日期编号，并从0开始对每个月中的日期进行编号？为什么这如此普遍？这是谁最初的想法？

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