XP

Cus no pointers?

There are pointers though

Yeah in unsafe code. Normally you use refs or wrapped pointers like in C++.

Yeah

#noendl

But if you really, really, need a raw pointer you can have it provided you declare that this code is unsafe

Oof, but flushing is needed for synchronized printing

But if you really, really, need a raw pointer you can have it provided you declare that this code is unsafe

yeah that's cool like in C# for fast applications like games Rust is the better choise but for low level software I would always prefer C++ or C I don't want .map(...).zip().unwrap().extract().iter().filter_mut() in my OS or VM sorry

yeah that's cool like in C# for fast applications like games Rust is the better choise but for low level software I would always prefer C++ or C I don't want .map(...).zip().unwrap().extract().iter().filter_mut() in my OS or VM sorry

Why do you not want that?

Why do you not want that?

because it hides the generated code very well if I write a simple for loop in C I know that's going on. The same in C++ even with a range base loop. But with Rusts overkill abstracted iterators I do not. So for low level software I would not use Rust But like I said for games and general applications which needs to be fast it's a good choise

I would argue Rust is even more relevant for low-level software that probably runs with higher privileges than a game or a general application

Since Rust tries to fix (and seems to succeed in fixing) the most common sources of security holes

yeah that's cool like in C# for fast applications like games Rust is the better choise but for low level software I would always prefer C++ or C I don't want .map(...).zip().unwrap().extract().iter().filter_mut() in my OS or VM sorry

Haha

Since Rust tries to fix (and seems to succeed in fixing) the most common sources of security holes

in C but not C++ I agree that C in low level code is critical but C++ fixes most of the problems too (modern C++)

Is there anything faster than a mutex?

Is there anything faster than a mutex?

atomic variables/atomic semaphore mutex is a kernel space construct that's slow

#cs50

Anything fast enough to be equal speed with single thread?

in C but not C++ I agree that C in low level code is critical but C++ fixes most of the problems too (modern C++)

C++ fixes most of the problems in theory, but in practise there's no way of proving that your code is safe with C++. Rust is mathematically provably safe.

C++ fixes most of the problems in theory, but in practise there's no way of proving that your code is safe with C++. Rust is mathematically provably safe.

maybe it is it is true that you need to be very good in C++ to write safe code but if you know C++ it's a beast if you use compiler specific attribute there is nothing faster

maybe it is it is true that you need to be very good in C++ to write safe code but if you know C++ it's a beast if you use compiler specific attribute there is nothing faster

Not even the best programmers write safe C++. Look at Chromium. Google has the money to employ great programmers and still 70% of security bugs in Chromium are things safe Rust should prevent

https://www.zdnet.com/article/chrome-70-of-all-security-bugs-are-memory-safety-issues/

guys im a 11grader i want to learn something stunning to make my classmates go 😱😱😱 ahahaha

what can i learn? only c plz😂

Not even the best programmers write safe C++. Look at Chromium. Google has the money to employ great programmers and still 70% of security bugs in Chromium are things safe Rust should prevent

yeah but plenty of code is very old in chromium these old code should be replaced with modern C++

what can i learn? only c plz😂

write a small x86 assembler

#best-book

write a small x86 assembler

like an assembly to c converter?

guys im a 11grader i want to learn something stunning to make my classmates go 😱😱😱 ahahaha

😂😂😂

guys im a 11grader i want to learn something stunning to make my classmates go 😱😱😱 ahahaha

Should have started years ago

For me nothing can replace c/c++ never and ever)

have you tried rust?

i wanna learn c. could somebody help me?

just wanna learn Qt

and opencv

like an assembly to c converter?

no an assembly to machine code converter

no an assembly to machine code converter

assembly is machine code

assembly is machine code

no it's not

well, it is.

in an indirect way

no it's not

+1

well, it is.

no assembly is just text representation of machine code each instruction you write in assembly is splitted into multiple instructions at machine code level for example movl $1, %eax movl (%eax), %ecx are all different machine code instructions but you write mov only

yep.

well,im intending to build an operating system based on ubuntu, thats pretty much the reason im gonna learn c.

in an indirect way

also machine code is binary only very complex encoded data x86 has variable length instructions so assembling assembly is not even that easy

Should have started years ago

who said I've started this year🤷🏻‍♂

https://www.chegg.com/homework-help/questions-and-answers/question-write-c-program-creates-linked-list-10-random-integers-0-100-program-must-perform-q76620405

help guys

help guys

What problems do you have with it?

https://www.chegg.com/homework-help/questions-and-answers/question-write-c-program-creates-linked-list-10-random-integers-0-100-program-must-perform-q76620405

This is not code writing service group, put away your homework!

This is not code writing service group, put away your homework!

Just allow people to give out their opinions and comments .....its their right

Just allow people to give out their opinions and comments .....its their right

It would have been fine if he asked specific part of his problem and not dropping the whole homework without even giving a try to do it himself.

Anyone good at linked list?

Anyone good at linked list?

Yes ask your q. Here

How to make presentation

How to make presentation

powerpoint.

Add temp2->next = head->next; before head=temp2 And temp->next->next = NULL Before return.

https://www.chegg.com/homework-help/questions-and-answers/question-write-c-program-creates-linked-list-10-random-integers-0-100-program-must-perform-q76620405

/warn write it yourself

And for others I remind that Rust is indeed offtopic here

And for others I remind that Rust is indeed offtopic here

Even if you're contrasting it with C/C++?

Hello, since I've been using Python and Bash most of the time I ran into an obstacle when starting out with C++. Below I attach my simple implementation of quicksort in Python (why not C++ scratch? I think a correct code is simply better to read :)). As you can see it recursively generates 3 arrays and when the stack is done, it merges those arrays into a single, sorted one that is finally returned. Could anyone at least point me what should I use to achieve it in C++? I don't care about arrays, it may work with vectors (but arrays are preferable), as well. I've been reading about it a lot but all the time I get either different quicksort functions or accessing the base array via pointer, none of them does help me. If you want to show an example code, it may be even Java. I will appreciate any help, thanks in advance :) def quicksort(array): if len(array) < 2: return array else: div_point = [array[randint(0, (len(array)-1))]] lesser, greater = [], [] for element in array: if element < div_point[0]: lesser.append(element) elif element > div_point[0]: greater.append(element) else: div_point.append(element) return quicksort(lesser) + div_point + quicksort(greater)

Hey, if I take a pointer and do realloc on the same pointer , it'll keep it's initial pointer address? char *ptr;--> this address. /* Code */ ptr = realloc (ptr, 100*sizeof(char); ptr --> the same as this?

Hey, if I take a pointer and do realloc on the same pointer , it'll keep it's initial pointer address? char *ptr;--> this address. /* Code */ ptr = realloc (ptr, 100*sizeof(char); ptr --> the same as this?

It may be the same and may be different. For safety, you have to always assume that realloc returns different pointer.

So it's best that I'll make a new pointer in a function if I take a pointer as argument, use the one I made and then just reassign the new one to the parameter pointer? void somefun(char *p){ char *ptr; /* Some code */ p = ptr;}

So it's best that I'll make a new pointer in a function if I take a pointer as argument, use the one I made and then just reassign the new one to the parameter pointer? void somefun(char *p){ char *ptr; /* Some code */ p = ptr;}

No, the assignment will only be local if you do that. Your caller may crash due to "Use After Free" if the pointer changes after realloc. You need to: void somefun(char **p) { char *tmp; char *ptr = *p; tmp = realloc(ptr, some_size); // some code.. // some code.. // some code.. // some code.. *p = tmp; }

So to affect the global scope char* I have to take **p in the local scope, just making sure I understood it right

So to affect the global scope char* I have to take **p in the local scope, just making sure I understood it right

Oh, if it is global, you don't have to.

Oh :) but still I'll have to make a *temp right?

Oh :) but still I'll have to make a *temp right?

Yeah, also you need to check whether it returns NULL or not.

Because realloc may fail, when it fails, it returns NULL, and set the errno to ENOMEM.

Thanks!! You helped me a lot!

float about_four_en_arf = sqr(4.5F);

/warn write it yourself

It was a mistake

/warn write it yourself

I sent here wrongly bro

powerpoint.

LibreOffice..

Anyone good at linked list?

I am also looking for buddy :)

How to make presentation

/warn offtop

No, the assignment will only be local if you do that. Your caller may crash due to "Use After Free" if the pointer changes after realloc. You need to: void somefun(char **p) { char *tmp; char *ptr = *p; tmp = realloc(ptr, some_size); // some code.. // some code.. // some code.. // some code.. *p = tmp; }

nice

C goes BASIC _10: printf("hello\n"); _20: goto _10;

C goes BASIC _10: printf("hello\n"); _20: goto _10;

Yep, that can be done in C