Can u get me a link?

C++ had something like a Java @Anotation

Hie can u convert kilometres to meters?

try it once on your own, if you still cant make it then text me I can look into you code

I agree its my homework but i tried

Unless it is a pure virtual function in which case it is ok for it to not have a body.

what is a pure virtual function

can i do virtual void ProcessFile() = FUNCTION_POINTER; ?

I don't know what that is supposed to mean. If you meant to ask if you can assign the address of a virtual function to a pointer to a member function then the answer is yes

i mean if you can assign a memory address to a function and call it in that way

No

what's the diff between unordered_multiset and unordred_map? from what I understood both store the elements with their count

Hello guys how to check exists external process by pid? I found smth about int kill(pid_t, int); But i cannot import it, there is no this function idk why

Unordered map stores data in key value pairs, while multiset would only store the keys. In unordered map, the value can be anything, not necessarily an integer.

I'm going to change my job from automation to embedded programming, i have an information that they will test me on C/Cpp to test my logical thinking, especially on OOP, via yours C/Cpp experience, could you guys suggest me some sample that they can ask me in the interview ? thanks

Void ( ) { Int digit ; For (digit = 0; digit<=9; digit++) Cout<< digit <<"/n"; Digit = 5*digit; - - digit; } Why the output is 49?

Are you on a POSIX system? The function prototype is in signal.h header. To check if a pid is valid, you can call this function like kill(pid, 0). If this call returns -1 and errno is set to ESRCH then it means the pid does not exist. If it returns 0, it means the PID is valid. But remember that even if the PID is valid, it may not refer to the process you expect. That process could have died and another spawned process could have taken on the same pid value.

i didnt send the code bcz i cant send it in the groupe

I want to take few characters as input but the exact number is now known... How can i do it in c++?

you take n numbers, try if it is all, if yes, you are done, if not, you take another n (or you do doubles)

No like for different test cases there will be different value of n and it's not provided in the question

well... what's wrong with reading it by parts? I mean where is my algorithm wrong

But how will i know if i took all the inputs?

well you will read to the end and get EOF? (End of File) or you would get end of line (EOL) if you want only one line parse. Or you would read character that is not a digit

I tried using ... While(cin.get(c)){ if(c=='\n') }

Can you give an example? Please

I tried using ... While(cin.get(c)){ if(c=='\n') }

of course you could read it char by char, that would work too

but this is giving runtime error

https://pastebin.com/jqNiwPFK

Check this code

ye... i cannot understand that code

I want to take few characters as input but the exact number is now known... How can i do it in c++?

could you please recommend c/c++ build systems. i know about Cmake(but it is hard to use, as for me). I also heard about bazel, its declarative syntax look nice. so, guys, any suggestions or maybe your own experience?

could you please recommend c/c++ build systems. i know about Cmake(but it is hard to use, as for me). I also heard about bazel, its declarative syntax look nice. so, guys, any suggestions or maybe your own experience?

why if i delete 2 times (f.e i forgot) array (heap) it does not matter, i will get double free detected error, but when i make something like : array = nullptr; and delete the array second times in another place of the program i wont get the error. Because of that the nullptr makes pointer of variable NULL (0x0000000) and if we delete this memory many times with ::operator delete nothing will happen yea???

When you delete an array, the memory allocated to the array is deallocated and returned to the heap. If you try to delete the same memory again, you will get a double free error because the memory has already been deallocated. In the case where you set the array pointer to nullptr, the pointer no longer points to the memory previously allocated to the array. If you then try to delete the memory again using this null pointer, it is safe to do so because deleting a null pointer has no effect. The reason for this is that the delete operator checks whether the pointer is null before trying to deallocate the memory. If the pointer is null, the delete operator does nothing. However, it is important to note that setting a pointer to null after deleting the memory is not a solution to the double-free problem. This is because the memory that was previously allocated to the array is still potentially accessible until the pointer is set to null. If you try to access that memory using the pointer after it has been deleted, you will get undefined behavior. It's always a good practice to ensure that you only delete memory once and avoid using null pointers to try and prevent double-free errors. If you're not sure whether a pointer has been deleted or not, you can set it to null after deleting it to prevent any accidental use, but you should still be careful to avoid accessing the memory that was previously allocated to the pointer.

did ChatGPT generate it?

ChatGPT would be really helpful in this chat

When you delete an array, the memory allocated to the array is deallocated and returned to the heap. If you try to delete the same memory again, you will get a double free error because the memory has already been deallocated. In the case where you set the array pointer to nullptr, the pointer no longer points to the memory previously allocated to the array. If you then try to delete the memory again using this null pointer, it is safe to do so because deleting a null pointer has no effect. The reason for this is that the delete operator checks whether the pointer is null before trying to deallocate the memory. If the pointer is null, the delete operator does nothing. However, it is important to note that setting a pointer to null after deleting the memory is not a solution to the double-free problem. This is because the memory that was previously allocated to the array is still potentially accessible until the pointer is set to null. If you try to access that memory using the pointer after it has been deleted, you will get undefined behavior. It's always a good practice to ensure that you only delete memory once and avoid using null pointers to try and prevent double-free errors. If you're not sure whether a pointer has been deleted or not, you can set it to null after deleting it to prevent any accidental use, but you should still be careful to avoid accessing the memory that was previously allocated to the pointer.

Man, ChatGPT is great

why if i delete 2 times (f.e i forgot) array (heap) it does not matter, i will get double free detected error, but when i make something like : array = nullptr; and delete the array second times in another place of the program i wont get the error. Because of that the nullptr makes pointer of variable NULL (0x0000000) and if we delete this memory many times with ::operator delete nothing will happen yea???

How to start C programming from beginning

Do we have a huge difference between clang, mscv, or gcc? I will have some troubles later when I'll using for example clang instead of mscv currently?

Mohamed Salah sent a code, it has been re-uploaded as a file

Do we have a huge difference between clang, mscv, or gcc? I will have some troubles later when I'll using for example clang instead of mscv currently?

Hello? I am new learning C++, how to code it Ubuntu?

Is bits/stdc++ header file includes every other single file in C++?