PureBasic Forums - English

I am not a mathematician but I think Mr. Mathologer made a mistake in his presentation of the last correction term
1/(N+1/(4*N+4/(N+9/N))) it should be 1/(N+1/(4*N+4/(N+9/4/N)))
with N=10 we have
Pi = 4 - 4/3 + 4/5 - 4/7 + 4/9 - 4/11 + 4/13 - 4/15 + 4/17 - 4/19 = 44257352/14549535 = 3 ...

Pi is an interesting number, recently I watched this Mathtologer video about the Powell's Pi paradox https://youtu.be/ypxKzWi-Bwg?si=JpGYCbrGyO2vnzGh
I think that most people know about this series for Pi, Pi/4 = 1 - 1/3 + 1/5 - 1/7 ..., if you multiply the series by 4 you get Pi = 4 - 4/3 + 4/5 - 4 ...

@AZJIO
Quin is blind, don't think that a video would help

I upgraded from Mojave to Sequoia, it's possible that something from Mojave was not purged properly, I did delete the commandlinetools directory and then re-installed it, Xcode I simply upgraded, surely the upgrader should take care of everything, right?

hi mk-soft, what hardware are you running, Intel or Apple-M ?
I am running on Intel x86_64
I was trying the latest versions, even the beta
macos version 10.15 is Catalina

honestly, Apple is releasing way too many OS versions, it seems that there's a new version every month !
remember when the Pepsi guy was CEO of Apple?
they would churn-out a new mac every week, the consumers were totally confused, of the 10000 mac models, which one do I get?

I have the latest macos Sequoia 15.54 installed on an Intel x64 mac and PB won't compile anything, the linker complains something like this (paraphrasing from memory) "PB was built on a newer version 15.15 and is not compatible with version 10.7"
I have the latest xcode and the latest command-line ...

I don't know of any books or tutorials except for bits and pieces on the web, perhaps some other member knows
this could be useful https://github.com/namantam1/x86-assembly

a slightly more interesting example using the gcc extended inline syntax

Procedure.q fib(ub.l, *f)
If (ub<3)
ProcedureReturn 1
EndIf
; !set_dpfpu();
!asm (
! "mov %[p_f], %%rax;"
! "fldz;"
! "fistl (%%rax);"
! "add $8, %%rax;"
! "fld1;"
! "fistl (%%rax);"
! "add $8, %%rax;"
! "mov ...

gcc extended asm is a very strange animal, it takes a special kind of mindset to understand it, you can find small examples on the web but it's tricky to adapt to PB
here's an ultra-simple and useless example

Procedure.d get_pi()

Define.d pi

!asm (
! "fldpi\n"
! "fstpl %[v_pi]\n"
! :[v_pi ...

hello Michael Vogel, the dlls in the link are x86 and x64 dlls, I am confused as to why you think that they are ARM

you may download GMP-MPFR

I had a look at the libxlsxwriter project, the project builds quickly and without any warnings or errors using msys2
but some of the headers are a bit complex

did you know about LuaJIT — a Just-In-Time Compiler for Lua ?
http://luajit.org/luajit.html

...
This sounds easy but here is the catch: for Windows the developer recommends to use the extension (dll) version, but for Linux the recommendation is to use the static lua lib. This is not as easy as it sounds, creating a working static Lua lib is surprisingly hard (for me, on Windows, using it ...