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From: David Brown <david.brown@hesbynett.no>
Newsgroups: comp.lang.c
Subject: Re: "A diagram of C23 basic types"
Date: Tue, 8 Apr 2025 10:29:13 +0200
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On 07/04/2025 21:29, Richard Heathfield wrote:
> On 07/04/2025 19:12, Michael S wrote:
>> On Mon, 7 Apr 2025 19:02:34 +0100
>> bart <bc@freeuk.com> wrote:
>>
>>> On 04/04/2025 04:01, Lawrence D'Oliveiro wrote:
>>>> On Wed, 2 Apr 2025 16:33:46 +0100, bart wrote:
>>>>> Here, tell me at a glance the magnitude of
>>>>> this number:
>>>>>
>>>>>        10000000000
>>>>
>>>>       #define THOUSAND 1000
>>>>       #define MILLION (THOUSAND * THOUSAND)
>>>>       #define BILLION (THOUSAND * MILLION)
>>>>
>>>>       uint64 num = 10 * BILLION;
>>>>
>>>> Much easier to figure out, don’t you think?
>>>
>>> Try 20 * BILLION; it will overflow if not careful.
>>>
>>> I'd normally write '20 billion' outside of C, since I use such
>>> numbers, with lots of zeros, constantly when writing test code.
>>>
>>> But when it isn't all zeros, or the base isn't 10, then numeric
>>> separators are better.
>>>
>>
>> Is not it "20 milliards" in British English?
> 
> Yes. The British use
> 
> 1 - one
> 10 - ten
> 100 - hundred
> 1 000 - thousand
> 10 000 - myriad
> 100 000 - pool
> 1 000 000 - million
> 1 000 000 000 - milliard
> 1 000 000 000 000 - billion
> 1 000 000 000 000 000 - billiard
> 1 000 000 000 000 000 000 - trillion
> 1 000 000 000 000 000 000 000 - trilliard
> 1 000 000 000 000 000 000 000 000 - snooker
> except for journalists, politicians, stockbrokers, and anyone else who 
> spends far too much time talking to Americans.
> 
> The biggest number you're likely to need in the real world is 100 
> tredecimillion, which is approximately the number of atoms in the known 
> universe.
> 
> ObC: I am currently roughing out a proposal for the ISO folks to 
> introduce the 288-bit long long long long long long long long long int, 
> or universe_t for short, so that programs will be able to keep track of 
> those 100 tredecimillion atoms. Each universe_t will be able to count 
> atoms in almost five million observable universes, which should be 
> enough to be going on with.
> 

I remember reading a proposal to generalise the C integer type names, 
allowing for things like "short long int" for 24-bit, "short short short 
int" for 4-bit, and so on.  It was not accepted into the standards - 
perhaps because of the date (first of April).