XOFF
As an engineer my knowledge comes from lectures i took and lots of experiments on kernel based applications
Houdaifa
thank you
Azadi
so the OS have a copy of all the pointers ?
You've allocated some dynamic memory in your program and then forget to free it. The OS manages both your program and memory, so it (hopefully) frees that memory block.
Mar!o
Question about memory managment
When you quit a program how the OS can know what memory spaces to free ?
In the case when you declare variables on the runtime and lose thier adress
the OS (kernel memory manager) does some bookkeeping about the memory it gave to process x
remember that functions like malloc do not always directly allocate from the OS
depending on the allocator there is a free-list inbetween to avoid fragmentation
and only big chunks are requested using mmap, brk oder VirtualAlloc etc..
when process x ends, it simply also frees all associated resources
luckily it does that
if not some program might fill up your ram and even when you close it the ram will remain so you have to reboot your pc :(
Maynk
Hi
Maynk
Is there any channel to learn c++
Dima
use your brain
Tazin
You may follow w3schools. That's a website though
Tazin
Or programming with harry YouTube channel
B;
Is there any channel to learn c++
Best way it to code, don't fall into tutorial hell. I started last year
B;
Best way it to code, don't fall into tutorial hell. I started last year
And I am on the verge of getting gold badge from HACKER RANK
Maynk
Best way it to code, don't fall into tutorial hell. I started last year
What if i don't know anything about coding then how can I code -_- ?
B;
What if i don't know anything about coding then how can I code -_- ?
For absolute beginners I recommend joining offline classes.
Maynk
Oh but I think I am in the middle I know about coding and know how to code
Maynk
I am not absolute beginner though
Maynk
I am learning c++
Maynk
Bro I am on 6th video 😂
Ehsan
Is there any channel to learn c++
The Cherno is very good, but I think best way to learn c++ is with books
Maynk
i only know a little coding
B;
Bro I am on 6th video 😂
I hold certification in data structures and algorithms. I still consider my self a beginner.
Chat Boss
Maynk Mahaur sent a code, it has been re-uploaded as a file
Ehsan
https://www.edx.org/course/introduction-computer-science-harvardx-cs50x
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Ehsan
Why?
Because you are a beginner. Most people start coding not knowing what they are actually doing; programming and coding are not the same. You must have a sound understanding of the field in general before you dive deep; also C++ is not a recommended language for beginners as it has too many features and you can easily get overwhelmed.
B;
No I am on basic input & output
You're on level 0. Join a proper class for coding. Offline recommend
Maynk
Ok
B;
Which certification?
A certification from a computer science institute, where I took classes for DS algo.
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A certification from a computer science institute, where I took classes for DS algo.
Oh, I thought it's online certification
Maynk
B;
Oh, I thought it's online certification
I belive in offline classes . I like in person learning more . I will switch to online classes for more advance concepts
Maynk
Lmao
Maynk
Maynk
Because in my country online courses are more suggested than offline
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bruh
Ehsan
I am promoting your group lol
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#ot
Dima
/blue_text_must_click
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There
Danya🔥
/blue_text_must_click
Maynk
Lmao what is this
Danya🔥
Self-destruction
%Nikita
Because it has more science-related capabilities built-in
But we can rewrite Fortran science library in C :)
Ehsan
But we can rewrite Fortran science library in C :)
You can write anything with any complete turing language
%Nikita
You can write anything with any complete turing language
Sure. Back in the old days, when we were switching from Fortran to C, my colleagues were not comfortable with LibC, because it’s math.h module had just primitive math functions like sin, cos, abs, etc.
My idea was to rewrite most used part of Fortran library in C, or make it somehow compatible with C. But, unfortunately we hadn’t got the source, because Fortran was running on USSR M-222 computing machine, which had very rare architecture, and was kinda experimental. So we disassembled some functions and made our own header to make it possible to do Fortran stuff in C
It was a long time ago, and I don’t remember where this header is now :)
Danya🔥
But we can rewrite Fortran science library in C :)
I just do not think that C is suitable for any sort of stuff except OS and microcontollers
I'd write it in C++, personally. If there are specific performance requirements - I'd write it in the limited C++ - without exceptions, RTTI and other stuff.
C is not suitable for this kind of stuff, because it's basically a portable assembly language with syntactic sugar
%Nikita
I just do not think that C is suitable for any sort of stuff except OS and microcontollers
I'd write it in C++, personally. If there are specific performance requirements - I'd write it in the limited C++ - without exceptions, RTTI and other stuff.
C is not suitable for this kind of stuff, because it's basically a portable assembly language with syntactic sugar
It’s very well designed “portable assembly language with syntactic sugar” btw :)
Danya🔥
It’s very well designed “portable assembly language with syntactic sugar” btw :)
No, I do not think so
char* foo = "Hello";
Is this the example of the good design?
%Nikita
I just do not think that C is suitable for any sort of stuff except OS and microcontollers
I'd write it in C++, personally. If there are specific performance requirements - I'd write it in the limited C++ - without exceptions, RTTI and other stuff.
C is not suitable for this kind of stuff, because it's basically a portable assembly language with syntactic sugar
The language itself also gives you pretty good explanation of some common computer architecture concepts. It’s relatively easy and makes sense if you had programmed in assembly
%Nikita
No, I do not think so
char* foo = "Hello";
Is this the example of the good design?
Sure, there is nothing wrong with it. Foo points to string located somewhere in memory
Danya🔥
The language itself also gives you pretty good explanation of some common computer architecture concepts. It’s relatively easy and makes sense if you had programmed in assembly
So how do I get to know about ALU or MMU while learning to use C?
%Nikita
So how do I get to know about ALU or MMU while learning to use C?
But it’s the same with assembly
Danya🔥
Sure, there is nothing wrong with it. Foo points to string located somewhere in memory
The string literal has type const char[6] but I assign it to non-const pointer and it is valid C. Is it truly ok?
Danya🔥
But it’s the same with assembly
So what? We do not actually get to know about the computer architecture while programming in C, right?
%Nikita
The string literal has type const char[6] but I assign it to non-const pointer and it is valid C. Is it truly ok?
I think it’s your fault, and also writing to strings defined as
char *thing = “thing”;
Is clear UB
Danya🔥
I think it’s your fault, and also writing to strings defined as
char *thing = “thing”;
Is clear UB
This is not UB, it is VALID C