https://imgur.com/WnF6W87

Hello guys, can someone help me for this?

By "help" you mean "do it for me"?

No

I made something, lemme write

#include <stdio.h> #include <stdlib.h> int main(){ for(int i=9;i>=1;i--){ for(int j=i;j>=1;j--){ printf("*"); } printf("\n"); } return 0; }

I made other side too but not at the same line

Hi, is there UB?) std::unique_ptr<leBrep> _brep = std::make_unique<IwBrep>(new(*_context)IwBrep());

Hi, is there UB?) std::unique_ptr<leBrep> _brep = std::make_unique<IwBrep>(new(*_context)IwBrep());

Probably not, but I don't think that the code does what you intended

If you intend to make zero allocations here — it doesn't happen here — make_unique allocates

Hi, is there UB?) std::unique_ptr<leBrep> _brep = std::make_unique<IwBrep>(new(*_context)IwBrep());

Maybe. You are using the placement form of new. So depending on how *_context is allocated, this may cause Undefined Behavior. For example if *_context is a char buffer, then this is definitely Undefined Behavior.

Maybe. You are using the placement form of new. So depending on how *_context is allocated, this may cause Undefined Behavior. For example if *_context is a char buffer, then this is definitely Undefined Behavior.

What type of *_context allowed to be?

What type of *_context allowed to be?

It should be of type *lwBrep or a type derived from it as long as lwBrep has a virtual destructor

Maybe. You are using the placement form of new. So depending on how *_context is allocated, this may cause Undefined Behavior. For example if *_context is a char buffer, then this is definitely Undefined Behavior.

> For example if *_context is a char buffer, then this is definitely Undefined Behavior. Not really Depends on characteristics of lwBrep

> For example if *_context is a char buffer, then this is definitely Undefined Behavior. Not really Depends on characteristics of lwBrep

It is definitely Undefined Behavior because the char buffer can't be destroyed using a delete operation on lwBrep pointer.

It is definitely Undefined Behavior because the char buffer can't be destroyed using a delete operation on lwBrep pointer.

If lwBrep is a friend class for context?

If lwBrep is a friend class for context?

UB

It is definitely Undefined Behavior because the char buffer can't be destroyed using a delete operation on lwBrep pointer.

If the buffer is the same size as the type of an object being created and if the type is trivial, it's not an UB

If the buffer is the same size as the type of an object being created and if the type is trivial, it's not an UB

I said am assuming that lwBrep has a virtual destructor. So it is not a trivial type by assumption

I said am assuming that lwBrep has a virtual destructor. So it is not a trivial type by assumption

So, is lwBrep has virtual destructor it is UB?

So, is lwBrep has virtual destructor it is UB?

If it is not trivial

But it is virtual)

The requirements for the type to be trivial, you can find on cppreference

So, is lwBrep has virtual destructor it is UB?

If it has a virtual destructor it is not trivial. It will be UB then if *_context is not of type lwBrep*

I have some lists (markdown syntax) in str: some text * item 1 * item 2 * item 3 * item 1 * item 2 * item 3 some text I need using std::regex add signs around this list, for example: some text $ * item 1 * item 2 * item 3 $ $ * item 1 * item 2 * item 3 $ some text how to do this? I can find only items separately, but not all list. I need only right regular expression

Hello everyone!

Any tips on how I can best start learning Cpp?

I have tried reading books but they are just too complicated

I have tried reading books but they are just too complicated

try learning step by step

first definitions details and description ..so ur concept or dictionary will be clear

first definitions details and description ..so ur concept or dictionary will be clear

Okay okay, following...

then try to understand the single line commands and each words that relate un that program

there are course about c++ on swayam india

and they are very easy to understand they teach steps wise very fundamentally

then try to understand the single line commands and each words that relate un that program

It is a channel or something else?

its a govt official website to provide education

swayam included NPTEL ,CEC AND IGNOU in its course

then try to understand the single line commands and each words that relate un that program

Okay. I will definitely give all this a try. Thanks a lot for the response.

there are course about c++ on swayam india

Is it in English? If so please share the website... Thanks!!

just ping me if need any help

Is it in English? If so please share the website... Thanks!!

google swayam prabha courses

google swayam prabha courses

Please do not advise someone to take noname Indian courses

Or actually any noname courses

there are course about c++ on swayam india

If it's you first language, c will be better to start with

If it's you first language, c will be better to start with

No, it's not

No, it's not

There's just too much stuff to handle for one who doesn't know anything about programming

No, it's not

🤣🤣🤣

🤣🤣🤣

What's so funny?

There's just too much stuff to handle for one who doesn't know anything about programming

If the goal is to learn C++, a person should learn C++, not C

What's so funny?

I was also confuse when I started python but c++ help me to see it clearly So c++ is a good start

I was also confuse when I started python but c++ help me to see it clearly So c++ is a good start

C and C++ are not the same language, you know it, right?

C and C++ are not the same language, you know it, right?

Yep

Yep

So, why are you telling me this? Read the conversation

So, why are you telling me this? Read the conversation

Oh sorry I read it wrong thought you said c++

So, why are you telling me this? Read the conversation

But hey I've been learning c++ and phython but I don't know what to do with Erm can u suggest something

If the goal is to learn C++, a person should learn C++, not C

As he wishes, I just suggested to start from something easier

As he wishes, I just suggested to start from something easier

Then suggest to start with Python

Please do not advise someone to take noname Indian courses

pls dont interrupt if u didn't browse the thing by ur.own

I'm helping the guy atleast ...or u got the better idea to teach him...then pls tell... instead of making him demotivated

swayam is a platform to teach people c++

with fundamental.knowledge ... I'm sorry if u didn't know about it ...u should search and see the content then

u can thank me later

This is very important for programmers

BTreee

with fundamental.knowledge ... I'm sorry if u didn't know about it ...u should search and see the content then

Aren't those on TV only or something?

Aren't those on TV only or something?

yaa they broadcast their content on tv also

but taking course is better u can skip the video according to ur understanding... the course is free but they conduct exams for certification with a charge of 1000 rs

u can thank me later

For what? Probably another shitty course?

with fundamental.knowledge ... I'm sorry if u didn't know about it ...u should search and see the content then

#cppbookguide

but taking course is better u can skip the video according to ur understanding... the course is free but they conduct exams for certification with a charge of 1000 rs

He doesn't seem like Indian so how is he supposed to get those channels?

He doesn't seem like Indian so how is he supposed to get those channels?

I told him about the online courses provided by indian govt.. that also broadcast on tv for people like us

I told him about the online courses provided by indian govt.. that also broadcast on tv for people like us

Yeah but that isn't going to help him is it?

yes the courses for all including international students

https://telegra.ph/file/c90036db271f834d321ec.jpg how to fix this "Non-void function does not return a value" in this code?

https://telegra.ph/file/c90036db271f834d321ec.jpg how to fix this "Non-void function does not return a value" in this code?

code #include <iostream> using namespace std; class Note { // declare a static data member static int num; public: // create static member function static int func () { cout << " The value of the num is: " << num << endl; } }; // initialize the static data member using the class name and the scope resolution operator int Note :: num = 15; int main () { // create an object of the class Note Note n; // access static member function using the object n.func(); return 0; }

https://telegra.ph/file/c90036db271f834d321ec.jpg how to fix this "Non-void function does not return a value" in this code?

In order to fix the error, you need to return a value in the non-void function

In order to fix the error, you need to return a value in the non-void function

how can you please say error also says that only

https://telegra.ph/file/c90036db271f834d321ec.jpg how to fix this "Non-void function does not return a value" in this code?

The error says exactly what you need to change

The error says exactly what you need to change

can you please clear it send what to correct pls

https://telegra.ph/file/c90036db271f834d321ec.jpg how to fix this "Non-void function does not return a value" in this code?

using namespace std; 😅

https://telegra.ph/file/c90036db271f834d321ec.jpg how to fix this "Non-void function does not return a value" in this code?

Look at the function signature, in its contract, you specify that you return something but do you actually obey that contract?