Well I mean learning in depth... But... Ya, basics might not be hard, but also are not much different from C

Whatever my perl is <3

Not much but it is there

Lack of templates for example makes you store void* in containers and malloc more things than you would otherwise in C++. Which is additional indirection and performance hit for C code

It seems you're more experienced, I am just a python dev ¯\_ (ツ) _/¯

Maybe virtual functions and what not

That's wrong comparison IMHO. You need to COMPARE the same functionality implemented in different languages. How can you implement dynamic dispatch in C more efficiently?

That's wrong comparison IMHO. You need to COMPARE the same functionality implemented in different languages. How can you implement dynamic dispatch in C more efficiently?

You probably can't

The same way why most people cant write better asm than the compiler

The same way why most people cant write better asm than the compiler

For SIMD it's not even that hard to write better asm than the compiler

For SIMD it's not even that hard to write better asm than the compiler

That is if your architecture has simd. And you're smart enough to use it

But yeah comparison is kinda bs I agree

No you're not losing performance. You have the same level of low level access as C. And I bet std library implementation is better than whatever internal library generic company can write.

Well, about libraries, companies can do better for their specific needs. I mean they can trade e.g. some portability, but make a more performant container for their specific cases.

That is if your architecture has simd. And you're smart enough to use it

Well x86 and ARM both have SIMD

Well x86 and ARM both have SIMD

And you wouldn't probably write asm for it anyway. Unless you need simd

And you wouldn't probably write asm for it anyway. Unless you need simd

I would probably use intrinsics

From my experience it's the other way around. C++ is more readable code especially when working with large code bases. You use higher level abstractions and less boilerplate code.

Just use a container library or any high level library for C

Just use a container library or any high level library for C

What templates in C?🤔

What templates in C?🤔

Sorry, i mean container

Native of drawing GUI is system dependent. More closer to metal your code is, less portable it becomes.

Sorry about not replying. I went to sleep.

Native of drawing GUI is system dependent. More closer to metal your code is, less portable it becomes.

Someone told me a while ago that the best one can do is to make own operating system and start creating libraries all from scratch. Is it really the only way if at all it is ?

Regarding GUIs, there's no really native and crossplatform approach at the same time in C/C++. You may want to choose a library that suits your needs better, e.g. take a look at these: https://en.m.wikipedia.org/wiki/List_of_platform-independent_GUI_libraries

That's really what I'm trying to ask - how do those libraries do it ?

You can do gui in C but it shall be pain the arse. And why would you anyway

Okay, If I'm ready for the pain, how can it be done ? I bet it can't be worse than COBOL, which we were forced to learn in high schools. So please give me a push me in the right direction ?

Pure C and good GUI libraries operate on too distant levels of abstractions. In order to implement a standard gui library it will require to standardize the whole lot of things in-between these levels. Not only it's a lot of effort but also I think it will make the language more complex.

But lets say if I want to tell the machine to draw a rectangle, how would I have to tell it ? Also, is it something CPU alone cannot do ?

I dont trust that c++ with that overhead is fast as C, would rather use rust for that usecase

C++ is as fast as C

Maybe virtual functions and what not

If you need virtual functions in C, they will have the same overhead or even more, so it's not an overhead

Any book recommendation for self study c/c++

Any book recommendation for self study c/c++

#cppbookguide

can I ask some off topics things here? or any group for that ? It's related to software engineering.

can I ask some off topics things here? or any group for that ? It's related to software engineering.

#ot

C++ is as fast as C

I was told otherwise

That's really what I'm trying to ask - how do those libraries do it ?

I'm not 100% sure but I think they use platform-specific APIs like WinApi for Windows.

I was told otherwise

Bad for you

Bad for you

If you say so

C++ and C at 80km/h. Who do you think can go faster? :thonk:

Only difference I've ever seen is in compilation time, never in execution.

Only difference I've ever seen is in compilation time, never in execution.

C++ definitely sucks in compilation times but sometimes it improves C++ runtime over C

What about rust

What about rust

It's offtopic

:))

good leave

C++ definitely sucks in compilation times but sometimes it improves C++ runtime over C

How exactly does it do that ?

I mean how does it improve runtime ?

I mean how does it improve runtime ?

Improving runtime = longer execution time?

no

no

Sounds wrong

Did you assume that improvement meant it'd execute faster?

also no

it might do some optimizations to loops etc

faster execution isnt deterministic

I think it depends on what we're measuring. I think if someone tries to write something simple and superoptimized there won't be big differences But if it's something simple but written without thinking about performance, then C can be faster (because you will have to think about it there). If it's something big/complex and made with performance in mind, then C++ solution can be faster. Because writing in C++ you have better abstractions, more time to think about scalability, more tools to move stuff to compile-time instead of runtime. It basically frees your hands from problems you don't need to think about and you can concentrate on things that matter.

How exactly does it do that ?

To build a generic library in C you have to use void* (example: qsort function) — which forses you to do at least one more memory indirection To build a generic library in C++ you should use templates — they don't give such an overhead as C + they can be optimized more for the specific types you have + for example comparator for std::sort can be inlined easily, for qsort it'll be never inlined probably though

C++ gives more information for a compiler to optimize a program

But lets say if I want to tell the machine to draw a rectangle, how would I have to tell it ? Also, is it something CPU alone cannot do ?

@gameraccoon Can you answer this bro ?

@gameraccoon Can you answer this bro ?

Opengl exists

Also you can rasterize your triangles in software if you're so inclined

was that pun intended

Opengl exists

Exactly what I'm trying to ask, how does opengl tell the machine that it needs to draw a rectangle, are there instruction sets specially for those kind of things specially ?

But lets say if I want to tell the machine to draw a rectangle, how would I have to tell it ? Also, is it something CPU alone cannot do ?

Ok, let's see. You want to draw a rectangle, for this you need to have a window probably, you need to ask your operation system (or desctop environment?) to create a window for your app. In windows you probably will do something similar to this http://www.winprog.org/tutorial/simple_window.html Then to draw a line you can search for the API function for that or use something like opengl to draw your primitives there.

Exactly what I'm trying to ask, how does opengl tell the machine that it needs to draw a rectangle, are there instruction sets specially for those kind of things specially ?

API talks to the GPU driver

And gpu driver knows how to draw a triangle on its hardware

So GPU is what draws windows as well.

So GPU is what draws windows as well.

Not necessarily but yes

And gpu driver knows how to draw a triangle on its hardware

Can you please direct me to a lecture or a book related to this? Or a post? Or just what should I type in Google to get info on this

Exactly what I'm trying to ask, how does opengl tell the machine that it needs to draw a rectangle, are there instruction sets specially for those kind of things specially ?

https://wiki.osdev.org/Graphics_stack

Thank you very much.

Thank you very much.

More links are available here: https://legends2k.github.io/note/cg_resources/

Thank you very much. I really appreciate it.

But lets say if I want to tell the machine to draw a rectangle, how would I have to tell it ? Also, is it something CPU alone cannot do ?

There are forums available for graphics talks! learn more on X.org — here how it’s works (Generic): H/W(Card)—>DDI/DKI(device-driver)—>DRI(rendering engine)—>Xlibs(system libraries)—>Open/MesaGL—>User You may study details here.. https://www.x.org/wiki/guide/concepts/

Link some forums please

Also, are there any telegram groups for that ?

All computers in world are SIMD; SISD old pipeline, outdated. MISD, can be created, but face serious architectural issues. MIMD; best examples are multi-socket multi bus plane arch. Very high end.

Link some forums please

Visit x.org you will find lot there..

Ok, thank you very much

All computers in world are SIMD; SISD old pipeline, outdated. MISD, can be created, but face serious architectural issues. MIMD; best examples are multi-socket multi bus plane arch. Very high end.

gpu is simd, cpu has only limited simd set of instructions

Any body here c++ programmer ??

Any body here c++ programmer ??

no

Any body here c++ programmer ??

Everybody here

AG7💛 thanks ❤❤

Hello

Could you help me with a program in c?

Could you help me with a program in c?

Depends on whata is the problem