Re: "A diagram of C23 basic types"

On Mon, 7 Apr 2025 22:14:20 +0200
Janis Papanagnou <janis_papanagnou+ng@hotmail.com> wrote:

On 07.04.2025 20:18, bart 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. 

 
(Actually both 10/20 billion will overflow u32; I was thinking of 20
billion billion overflowing u64.)
 

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? 

 
We (UK) now use 'billion' for 1E9; in the past it meant 1E12.
 
'Milliardo' is Italian for 'billion'; perhaps in a few other
languages too. 

 
"In a few other languages"? - That was not my impression;
and a quick look into Wikipedia seems to support that.
 
The global map[*] is interesting!
 
(Read the articles for the details, the historic base, and
especially what's standard in countries, and why the common
standard is in some cases like GB not used primarily today.)
 
Janis
 
https://upload.wikimedia.org/wikipedia/commons/7/7c/World_map_of_long_and_short_scales.svg
 
Green - long scale
Blue - short scale
Turquoise - both, long and short
Yellow - other scales
 

I think that this map misses one important detail - majority of "blue"
non-English-speaking countries spell 1e9 as milliard/miliard.
I.e. for that specific scale they are aligned with "green" countries.
If you don't believe me, try google translate.