@programminginc - страница 2353

Erdem

(:

Emir

Is there a any difference between these codes? (as fast) Player a; a.isim = “emir”; ——————————— Player * a = new Player(); a->isim = “emir”; delete Player; ———————————— I think first code faster than second, because it allocated in stack memory, is it true?

Emir

that’s not an important point

Anonymous

Hello I am in need of help I am trying to configure an reed switch sensor for the esp32. I have problem by initialising and by configuring it! Thanks!

Francisco

Is there a any difference between these codes? (as fast) Player a; a.isim = “emir”; ——————————— Player * a = new Player(); a->isim = “emir”; delete Player; ———————————— I think first code faster than second, because it allocated in stack memory, is it true?

It's true, but the second code is not limited to the stack, so you can allocate as many as you want, as long as you have memory left

Emir

It's true, but the second code is not limited to the stack, so you can allocate as many as you want, as long as you have memory left

So if i want to write a fast program, i should use a stack memory all the time

Francisco

So if i want to write a fast program, i should use a stack memory all the time

That's what developers in embeded systems tend to do. Memory allocations are expensive, but they provide a lot of flexibility

Emir

Thanks a lot both of you

Anonymous

I am moving from c language to learning c++ so which book should I consider?

Anonymous

Ok tq I will give it a look 👍

zaman

I am moving from c language to learning c++ so which book should I consider?

zaman

i think he is not a beginner, he already complete c language .

Anonymous

Hello Members, I have started learning basics of C programming language. I'm using K&R C programming language book and using the Dev C++ compiler on Windows. Which library should I use to create socket and perform a simple server/client exercise? I could not find any resource written for Dev C++ compiler.

Renan

Hello Members, I have started learning basics of C programming language. I'm using K&R C programming language book and using the Dev C++ compiler on Windows. Which library should I use to create socket and perform a simple server/client exercise? I could not find any resource written for Dev C++ compiler.

Dev C++ is not a compiler, it is an IDE. It uses GCC as compiler, as far as I know.

Anonymous

Dev C++ is not a compiler, it is an IDE. It uses GCC as compiler, as far as I know.

So, Unix socket programming stuffs would work? I found some resources for Unix socket programming. I just don't have any Linux distro with me. So, I was confused what to do.

Nameful

So, Unix socket programming stuffs would work? I found some resources for Unix socket programming. I just don't have any Linux distro with me. So, I was confused what to do.

Install Linux 👍

Anonymous

Install Linux 👍

I love Linux. 😌 At the present moment it's not convenient for me to do so. So, have to use either Dev C++ or Tiny C compiler.

zaman

ohh...ok

zaman

thanks for your kind information.

Nameful

/report

Anonymous

/report

Dima

what

Dima

I see

Nameful

what

GOUTAM NANDA posted something spammy

Anonymous

Thank you. I will take a look into that.

Anonymous

Any Brazilian around here?

Renan

Any Brazilian around here?

Me. 👋

zaman

now i learn data structure and algorithm. so, i need a favour for your guys. has any groups you guys know that there are seriously discuses data structure and algorithm, like this group. please let me add.

zaman

thx

~~~~~~

/report

Anonymous

Hi guys, I'm doing an exercise that requires me to create two random access files. I've created them, and filled them with empty data, but when I try to read a line to see I everything is all right, I see that "fread" function doesn't read anything. Here is the code; I'm a newbie, so be aware that there could be some horrors lines ;) here is the code https://pad.riseup.net/p/freadDoesntRead-tmp

Anonymous

char msg[100] = "world" char *p = "hello"; sprintf(msg, "%s %s", p, strdup(msg)); Since nothing is pointing to the duplicated string produced by strdup, is the memory freed automatically?

Anonymous

char msg[100] = "world" char *p = "hello"; sprintf(msg, "%s %s", p, strdup(msg)); Since nothing is pointing to the duplicated string produced by strdup, is the memory freed automatically?

No

Renan

char msg[100] = "world" char *p = "hello"; sprintf(msg, "%s %s", p, strdup(msg)); Since nothing is pointing to the duplicated string produced by strdup, is the memory freed automatically?

I think in C nothing is freed automatically. Correct me if I am wrong. 😅 👍

Anonymous

thanks, like I said, I'm still learning. Honestly it's not clear to me this offset thing

Renan

OK. Thanks. 👍

Anonymous

No

Okay thanks

Anonymous

even if I use fseek to start from the beginning It doesn't change

Anonymous

Thanks, that was helpful.

Anonymous

ah, Ok, thanks, now I've understood my error

Anonymous

actually now it works

Achyut

Can anyone say how this program have been evaluated

Intel

guys pls anyone suggest link to the best program for learning c# i mean tool ?

Achyut

Can anyone say how this program have been evaluated

First ++ x execute after that x++ executed & value assiging to y is 22

Achyut

& x value will be 12

Anonymous

First ++ x execute after that x++ executed & value assiging to y is 22

no. first x++ is evaluated and its side effect is completed

Anonymous

then ++x

Achyut

Check on gcc compiler then you will known

Anonymous

the comma operator guarantees left to right evaluation. further, there is a sequence point between the lhs expression and the rhs expression of the comma operator

Emir

Can anyone say how this program have been evaluated

11?

Anonymous

First ++ x execute after that x++ executed & value assiging to y is 22

both x and y will be 12

Emir

what if int y = (x++, x++);

Achyut

no. first x++ is evaluated and its side effect is completed

Kkk, sorry i have not seen coma operator, I thought + operator Your ans is correct

Anonymous

Kkk, sorry i have not seen coma operator, I thought + operator Your ans is correct

if it was + operator, then the answer would have been undefined

Emir

what if int y = (x++, x++);

it’s 11, why ?

Anonymous

+ operator doesn't specify left to right evaluation and there is no sequence point between the operand expressions

Achyut

if it was + operator, then the answer would have been undefined

That time sure first ++ x execute after that x++ execute

Anonymous

it’s 11, why ?

y will be 11, x will be 12

Anonymous

That time sure first ++ x execute after that x++ execute

order of evaluation is unspecified

Anonymous

in store1 = f(x) + g(y); store2 = f(x) + g(y); it is completely possible that in the first calculation f(x) is evaluated first and in the second calculation g(y) is evaluated first

Achyut

y will be 11, x will be 12

No x and y both 12

Achyut

Check on gcc

Anonymous

No x and y both 12

he mentioned a different problem

Emir

No x and y both 12

y11 i checked

Anonymous