/get cbook

It is /get cbook

actually i was trying different arguments

actually i was trying different arguments

Alright

Does anyone here knows about google summer of code??

Lol

*Spider-man meme*

*Spider-man meme*

😹😹

Hi, what does the <=> operator do?

Hi, what does the <=> operator do?

Do you know how strcmp works?

Do you know how strcmp works?

Yeah

Yeah

It's the same deal basically

It's the same deal basically

if (str1 <=> str2) { //... }

?

Allows to automaticly generate 5 comparison operators

if (str1 <=> str2) { //... }

Is that code right?

if (str1 <=> str2) { //... }

I bet there's no <=> for const char*

I bet there's no <=> for const char*

So it's C++ stuff?

So it's C++ stuff?

Yes in C++20

Ohhhh...

Forgot !=

cout<<"hello peeps";

if (str1 <=> str2) { //... }

No

You then compare result of <=> with 0

Allows to automaticly generate 5 comparison operators

Not 5, 4: <, <=, >, >=

The spaceship operator is the primary operator only for these for operator

I love that name

But if you do auto operator<=>(T) = default; It also generates operator== but if it's not defaulted it doesn't generate

It 1- generates or 2- does the job of them all at once with one calling function <=> or 3- both? If 2, doesn't that cause an overhead?

It 1- generates or 2- does the job of them all at once with one calling function <=> or 3- both? If 2, doesn't that cause an overhead?

I don't understand your question..

I don't understand your question..

So basically Spaceship operator returns usual ordering objects Right?! Why do we need to generate other comparison operators automatically if <=> fits the same result?

So basically Spaceship operator returns usual ordering objects Right?! Why do we need to generate other comparison operators automatically if <=> fits the same result?

Because there's a lot of code that knows nothing about <=> and a < b is more readable than a <=> b < 0?

guys, why we should use pointers, i don't understand its use

in C or C++?

C++

I worked with them in Linked List, BST, and i know the use in that case

usually you should avoid raw pointers, but there are lots of cases(like optimization, allocators, C API etc) you need them

usually you use linked list from stl

so no raw pointers

I should implement a linked list of complex numbers

if you want to create your own linked list - probably you need raw pointers

I must used em hahaha

can you use stl?

I couldnt

so why do you ask about pointers?

probably you need them to implement linked list

guys, why we should use pointers, i don't understand its use

In C++ raw pointers aren't used much. Although there are cases when they are necessary.

Oh i get it

you pass the memory direction and then you can use the operator * or -> to access to data

I've never seen for(;;) before until today. I realize it's an infinite loop, similar to while(true) I've been using the latter all the time. When would we need to use for(;;) instead ? Or is it just the same ? Just a matter of preference ?

I've never seen for(;;) before until today. I realize it's an infinite loop, similar to while(true) I've been using the latter all the time. When would we need to use for(;;) instead ? Or is it just the same ? Just a matter of preference ?

Same as while(true), no condition at all.

sometimes when i write nothing after return the code compiles but sometimes it throws error: "return statement with no value" What happening?

I guys, i have a question concerning FIFO files. If i have a server and 3 clients. And they all comunicating with fifo files. How can i make my server work for 1 client and not making it wait for the 2 other clients

Because when using a named tube if i open a side the program waits the other side, how canci not make it wait

First In First Out. So that means a queue.

Hi👋

/admin

I'm trying to implement shared memory problems and I want to implement a program in which different processes work with a single shared memory. So I'm looking for a way in which I could set limits for a particular process that it does all the use of shared memory in that region

As if creating partitions for different processes. An suggestions how I should approach it?

I'm trying to implement shared memory problems and I want to implement a program in which different processes work with a single shared memory. So I'm looking for a way in which I could set limits for a particular process that it does all the use of shared memory in that region

you can't set limits for a particular process for volatile memory

Ohh

But you mean I will need to create different shared memory for different processes?

As if creating partitions for different processes. An suggestions how I should approach it?

you didn't mention OS, which one?

Linux

Linux

which one linux and what kernel supposed to be? 5? 2?

i suppose ubuntu 20.04 linux kernel 5

Ubuntu linux 18.04 and kernel 4.18

Ubuntu linux 18.04 and kernel 4.18

good. Linux distributions based on the 2.6 kernel and later offer /dev/shm as shared memory in the form of a RAM disk, more specifically as a world-writable directory (a directory in which every user of the system can create files) that is stored in memory. Both the RedHat and Debian based distributions include it by default. Support for this type of RAM disk is completely optional within the kernel configuration file.[5]

https://en.wikipedia.org/wiki/Shared_memory

So creating some sort of range or partition for different processes is not possible right?

https://www.ibm.com/support/knowledgecenter/ssw_ibm_i_72/apis/ipcshmct.htm

So creating some sort of range or partition for different processes is not possible right?

i think it is possible using ipc_perm, but it does not limits the *number* of connections, just access rights

Alright I'll try it out. Thanks for the help

Hi

Hi

hi

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Which is the best IDE for C++?

You can use 1D array of size m*n where m and n your dimensions by x and y. To access an element you do arr[j * m + i] where i and j coordinates by x and y.

Which is the best IDE for C++?

Code blocks or sublime text

Which is the best IDE for C++?

/get ide

If not inside then pop them