@programminginc - страница 2362

Ioioio

How to find ip address in c?

.

Dima

local or external one?

Ioioio

Local

Anmol

That is not the problem I'm facing. When i try to access TreeNode in the .cpp file, it gives me an error saying that it is an unidentified identifier

Jesvi

one simple question, which is better ?

Jesvi

python or c++, what are your thoughts ?

Dima

с++

Dima

python devs are weak and should treated as such

Dima

Ioioio

How to find ip address in c

Jesvi

Dima

How to find ip address in c

the first link in google, dayum https://stackoverflow.com/questions/122208/get-the-ip-address-of-local-computer

MᏫᎻᎯᎷᎷᎬᎠ

😂😂😂😂😂😂😂😂

Dima

OwO

MᏫᎻᎯᎷᎷᎬᎠ

I won the argument

MᏫᎻᎯᎷᎷᎬᎠ

Damn it dima It's easy to trigger you

Dima

show off however you want in ot group, please

Anonymous

the first link in google, dayum https://stackoverflow.com/questions/122208/get-the-ip-address-of-local-computer

that’s a local computer lol

Dima

that’s a local computer lol

I have asked him before

Dima

external one or a local address

Anonymous

how to find external one ?

Dima

he said the local one

Anonymous

he said the local one

i asked how to find the external one ?

Nils

Can I somehow tell C/C++ to store a variable exactly after another one?

Nils

No nevermind. I got a much better idea

Nils

I simply concenated them manually

Nils

With an array

Nils

And casts

Mar!o

short 16-bits float 32 😬

Dima

float2 lol

Nils

void concated[sizeof(int) + (sizeof(float) * 2)]; concated[0] = (void)int1; concated[sizeof(int)] = (void)float1; concated[sizeof(int) + sizeof(float)] = (void)float2; Something like that I think

Mar!o

Why not just union?

Nils

void concated[sizeof(int) + (sizeof(float) * 2)]; concated[0] = (void)int1; concated[sizeof(int)] = (void)float1; concated[sizeof(int) + sizeof(float)] = (void)float2; Something like that I think

yes, ugly. oops

Nils

Why not just union?

Oh, that's a great idea indeed

Nils

oh, right

Nils

I know

Mar!o

Yes and the union will have the size of the biggest element. So with a union with a short and float it will be size of float (32). Why do you need them concatted?

Nils

All I want is being able to write the data inside a struct or something like that all together into some file

Nils

So I can just read back the contents into the struct later

Nils

But that struct contains char arrays

Nils

Which means that they have to be stored next to the struct

Mar!o

Ahhh you want to serialize types into byte arrays

Nils

Yes

Nils

Exactly

Nils

And nope, I don't want libraries 😉

Mar!o

Well a pointer cast is undefined AFAIK because of alignment... you can do that with unions too!

Mar!o

union int2bytes { int i; char c[sizeof(int)]; };

Mar!o

Then add the chars to your struct or serialize the whole union...

Mar!o

Better use fixed types like int32_t

Mar!o

Because int's size is variable....

Mar!o

But it's not wrong that the union will have the size of the largest element

Sinan

Why is the output of this code 8 ? printf("%d", sizeof(NULL));

Anonymous

All I want is being able to write the data inside a struct or something like that all together into some file

fwrite(), fread() :/

Nils

fwrite(), fread() :/

Does it write contained char array arrays too?

Anonymous

Does it write contained char array arrays too?

it can write anything

Nils

But wouldn't it simply write the adresses then?

Mar!o

Why is the output of this code 8 ? printf("%d", sizeof(NULL));

NULL is ((void*)0)

Sinan

Oh okay thank you

Anonymous

Does it write contained char array arrays too?

no, you provide it a pointer to first address, size of each object, and the number of objects to copy

Anonymous

it copies the chunk of memory to a file without losing any precision/performing human readable conversions

Nils

it copies the chunk of memory to a file without losing any precision/performing human readable conversions

I know, but *char[] is an array of pointers...

Anonymous

I know, but *char[] is an array of pointers...

oh right, run a loop over the array i guess

Anonymous

one string per iteration

Nils

Wait if I store a function inside the struct, will it get stored inside the file too???

Anonymous

it can write anything

okay maybe writing pointers doesn't make sense for fwrite() and fread()

Nils

That would be a huge security risk in some applications

Nils

one string per iteration

Good idea…

Anonymous

Wait if I store a function inside the struct, will it get stored inside the file too???

you don't store functions inside struct, you store function pointers. obviously they will be copied by fwrite(). if fread()ing them during a later execution, you should change the function pointers to point to the correct functions

Nils

Okay... Basically I just a have a struct of data (including **char that I want to dump/restore to/from a file)

Nils

you don't store functions inside struct, you store function pointers. obviously they will be copied by fwrite(). if fread()ing them during a later execution, you should change the function pointers to point to the correct functions

ah, okay.

Nils

Okay... Basically I just a have a struct of data (including **char that I want to dump/restore to/from a file)

It's an entry of a user databse

Nils

I thought that could help storing the **char contents

Anonymous

I thought that could help storing the **char contents