问题
Since Hex (base 16) uses 0-9A-F, and (I'm assuming here) Base 17 uses 0-9A-G and so on. What symbols are used once 0-9A-Z are all used up.
回答1:
There is no standard answer for your question. "Base 36" is coincidentally convenient to talk about because:
- Hexadecimal conventionally uses 0-9a-f, so it's "obvious" to keep going through the alphabet.
- The Roman/ASCII alphabet runs out of steam at 'z'.
- Base 36 (regardless of how you represent it) is mildly interesting from a Mathematical perspective because 36 has so many divisors.
However, there's no universally-accepted convention for what sequence of characters one might venture into after 'z'.
回答2:
Well, look at base 64: 0-9, A-Z, a-z and then a few symbols depending on the context. (Base64 for the web tends to be different to other schemes to avoid URL/HTML encoding issues.)
回答3:
Digital clocks (base-60) use base-10 numbers as symbols and separate them with a separator symbol (like ':'). This way you'd never run out of symbols!
回答4:
The Babylonians used Sexagesimal math with base 10 numbers in groupings to form base 60 digits for the various 60's places. (This is where we get all the base-60 math used in angles and time.) This is probably the oldest precedent for the method of creating some some form of base-N digit using base-10 numbers.
回答5:
Base64 adds the lowercase characters and + and /.
回答6:
The standard way to write IPv4 adresses can be viewed as a base 256 representation, where decimal numbers are separated by points.
回答7:
well there's base64, and then Pokemon characters
回答8:
I'd go for 0-9, then A-Z capitals, then alpha to omega in lower case. That gets you to 60. After that, I'd go with Jeremy's answer.
回答9:
That's easy: 0..9 ++ A..Z ++ a..z ++ 阿..中. Couldn't be simpler.
回答10:
I would say Greek and Hebrew are two likely candidates, as they are used in mathematics.
回答11:
chinese maybe? wikipedia says that there are 47,035 characters in the Kangxi Dictionary!
回答12:
RAD50 got it to 40 (which is 50 in octal), not quite following this sequence. But hex wasn't so common then. Nor was lowercase.
来源：https://stackoverflow.com/questions/270747/what-symbols-are-used-after-base-36