and create a mutex for each thread, it doesnt matter the order, just that each thread has its own mutex

You don't create mutex per thread. To write to a variable for example you need to do something like : GetMutex() Write() ReleaseMutex()

Thank you very much, i have exam on this things soon

Yes i know this, i didnt understand only wich mutex variable to use if i have more threads or more variables

you can`t modify and read same non-atomic variable in several threads. Thus you should protect these vars using mutex. you can use one mutex for one var, or one mutex for one struct/several vars. this is called granularity. code for writing/reading these vars is called critical section. so each critical section should be protected by mutex

So if i have 2 critical variables in the function i have to use 2 mutex variables like Getmutex(1) Edit var1 Release mutex(1) Getmutex(2) Edit var2 Release mutex(2) ?

So if i have 2 critical variables in the function i have to use 2 mutex variables like Getmutex(1) Edit var1 Release mutex(1) Getmutex(2) Edit var2 Release mutex(2) ?

But its counter intutive, how do the program knows to wich mutex variables is related to the critical variable, even before being edited?

I understand thanks, so basically the rule is one critical section for one critical value

Because a struct can be considered as a single variable?

I don't understand how reverse iterators help you, but if it does what you want OK, I guess...

in other words. I have byte* arr1 = new byte[n]{ 1, 2, 3, 4, 2, 3, 5 }; byte* arr2 = new byte[m] { 2, 3}; std::magic(arr1, arr1 + n, arr2, arr2 + m) => byte* ptr_result which is pointing to second "2" (index == 4); what's I need

I dont get, why in a struct you can use only one mutex? If you have 100 variables in a struct you still can use only 1 mutex?

yes. just don`t read/write any of these 100 vars outside of your mutex

Guys ... C++ is so hard to use in VSC

No it's very easy just install C++ extensions

Installed but still don't get the output :(

Is it necessary to install VSC in disk c ?

Can u tell me this ?

Guys ... C++ is so hard to use in VSC

#cpp-vscode

Yes I installed thanks 👍

Write a program to subtract two numbers using function

Hey I am from india

I have 10 element linked list: Root-10-20-30-40-50-60-70-80-90-100-Null I managed to divide this in half: Root-10-20-30-40-50-Null Ptr2-60-70-80-90-100-Null How can I do this titled list like this: 60-70-80-90-100-10-20-30-40-50-Null

Anyone can tell me how to configure andro rat

Is there a potential case when this function can return not 1 for valid a and b (not inf, not NaN or sNaN)? int compare(float a, float b) { int n = 0; n += (a == b); n += (a > b); n += (a < b); return n; }

Why you mix float arguments with integers numbers?

Hey guys I'm facing some kinda problem in file handling (using C) Question : WAP to copy data from a file into different file . My program successfully copy it but problem is compiler GCC return infinite run if I use copy variable type as integer And phone compiler ( it's written Clang 6.0.0 ) return infinite run if I use copy variable type as character And I'm confused 😔

Show the code

You should paste via paste.ubuntu.com

You should paste via paste.ubuntu.com

Hey guys I'm facing some kinda problem in file handling (using C) Question : WAP to copy data from a file into different file . My program successfully copy it but problem is compiler GCC return infinite run if I use copy variable type as integer And phone compiler ( it's written Clang 6.0.0 ) return infinite run if I use copy variable type as character And I'm confused 😔

https://paste.ubuntu.com/p/bHPkrnWBkZ/

Hi In c or c++ sometimes in the scence of work gwith strings we come across with things like this: "%d" or "%s" I wanna know that what's this mean?

https://www.knowprogram.com/c-programming/printf-in-c/

Before Reading I see that in this article this matter is attributed to printf. Is same for cout or not? Or all of that is explained in article?

It seems that you're not initialising int copy; before you use it in while(copy != EOF) { fputc(copy, new); copy = fgetc(source); } did you try while ((copy = fgetc(source)) != EOF) { fputc(copy, new); } ? This is undefined behaviour as it's written now.

No, cout doesn't use formatter like this. We don't need them in C++ because of operator overloading

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