what is volatile keyword for ? And what's the use of it?

#googleit

Can anyone suggest me best website to learn c programming

Can anyone suggest me best website to learn c programming

there’s no the best one

Atleast can anyone suggest one of the website

Tqq so much

Hello guys! I can teach you competitive programming in c++. Algorithms and data structures are included. If you are looking for teachers, dm me!

What is the easiest way to learn C/C++: Official documentation or private/third party books? 🤔

There’s no easy way

What is the easiest way to learn C/C++: Official documentation or private/third party books? 🤔

Read it

There’s no easy way

Being possible is already a reason to continue. 👍

Being possible is already a reason to continue. 👍

#cppbookguide

Then how people learned it when no books existed? 🤔 Books help a lot, obviously. But there must be information to know the thing.

its called google

Then how people learned it when no books existed? 🤔 Books help a lot, obviously. But there must be information to know the thing.

There were always books

its called google

If your neighbor is nearer than google, then why waste time searching for something he already has? Wouldn't it be faster?! 🤔

People who wrote the first books must have acquired knowledge somewhere.

People who wrote the first books must have acquired knowledge somewhere.

its called practice

Thanks Madhu :)

Just reply to a message to purge from

Yep, that's the downside

So we need do it by hand

Can anyone suggest me best website to learn c programming

read Bjarne Stroustup books ..

I am trying to compile and run a simple hello world c++ code . G++ says no input files G++ fatal error: no input files Compilation terminated How to solve the problem?

#include<iostream> using namespace std; int main() {   cout<<"Hello World";   return 0; }

the command, this is the code

if your program name is hello_word.cpp you simply compile like g++ hello.cpp

😂

Thank you

Does anybody have any idea to implement recursion with digital circuts ?

Meaning logical gates

Meaning logical gates

Yeah Define a '||' or '&&' to your type and make a recursion call inside your function lool

I am sorry I asked in the wrong group. I meant to send it somewhere else.

I am sorry I asked in the wrong group. I meant to send it somewhere else.

you can ask here:

My question is not directly related to programming languages.

Hello Rose, I know my question may seem out of bounds. But you are a bot and I am wondering how you make decisions. Are requests or events forwarded to a real person who manages them or you are just an incredible bot that can somewhat superficially think or maybe another thing. I don't even know whether you understand me as I don't understand how you work.

lmao

I hope this is a pure sarcasm

Nope, just new to this whole thing with bots.

I am trying to compile and run a simple hello world c++ code . G++ says no input files G++ fatal error: no input files Compilation terminated How to solve the problem?

Can anyone help me ?

Who’s got good gateway?

#include <stdio.h> int main (){ printf("hello everyone! I'm new here"); return 0; }

#include <stdio.h> int main (){ printf("hello everyone! I'm new here"); return 0; }

Welcome

Welcome

Thank you 🤝

Hi there is a problem I was trying to solve Problem- https://www.hackerrank.com/challenges/dynamic-array-in-c/problem And attaching the solution in the below screenshot

So I understood the whole code except the few lines under If(total_number_of_pages[X] ==1) Why we are using malloc here and relloc after the else statement here? As in the code we already dynamically allocated memory to total_number_of_pages ?

#ASK Hi everyone, how can I avoid mangling name of C++ global variable? Consider this code, line 58 https://gist.github.com/ammarfaizi2/5c806c155c12f4b6d27922080c69d16b#file-web-compiled-cpp-L58 The variable const zend_function_entry GTPHP_HASH_GreenTea_Routes_methods[] has already been in extern "C".

But when I compiled it, it became _ZL34GTPHP_HASH_GreenTea_Routes_methods. How can I remove the _ZL34 here?

This makes my library that is linked to that object getting this error /home/ammarfaizi2/project/now/GreenTeaPHP/modules/greentea.so: undefined symbol: GTPHP_HASH_GreenTea_Routes_methods

I understood and I did wrap them, but it is still resulting the mangling name on my variable. I am still looking for where is the missing part here.

I did

https://gist.github.com/ammarfaizi2/5c806c155c12f4b6d27922080c69d16b#file-web-compiled-cpp-L58

Do I need to share my compile command? Give me a minute.

/usr/bin/g++ -Wall -I. -I/home/ammarfaizi2/project/now/GreenTeaPHP/build/greentea_php/routes -DPHP_ATOM_INC -I/home/ammarfaizi2/project/now/GreenTeaPHP/build/greentea_php/include -I/home/ammarfaizi2/project/now/GreenTeaPHP/build/greentea_php/main -I/home/ammarfaizi2/project/now/GreenTeaPHP/build/greentea_php -I/usr/local/include/php -I/usr/local/include/php/main -I/usr/local/include/php/TSRM -I/usr/local/include/php/Zend -I/usr/local/include/php/ext -I/usr/local/include/php/ext/date/lib -I/home/ammarfaizi2/project/now/GreenTeaPHP/src/greentea_php -I/home/ammarfaizi2/project/now/GreenTeaPHP/src/greentea_php/include -DHAVE_CONFIG_H -g -O0 -c /home/ammarfaizi2/project/now/GreenTeaPHP/build/greentea_php/routes/web.compiled.php.cpp -fPIC -DPIC -o routes/.libs/web.o -lpthread

Nothing special with zend_function_entry. The zend framework itself is supposed to be written in C, not C++. I have been working with it in C for a long time, but today I want to extend my extension with C++.

This is the zend_function_entry definition. http://www.phpinternalsbook.com/php7/extensions_design/php_functions.html

Thanks for your time.

Who can solve the following problem usin C language

A monkey picks some peaches, eats half of them and eats one more on the first day, and then eats half of the remaining peaches plus one on the next day, every day until the tenth morning The monkey found that there was only one peach left. How many peaches did the monkey pick on the first day? Output: a, b, c, d ....., sum Respectively: the number of peaches before eating peaches on the ninth morning, the number of peaches before eating peaches on the eighth morning, ..., the number of peaches before eating peaches on the first morning, total peach.

Thankyou thats what I was looking for

Which means if an array is of N dimension I have to allocate memory N times?

Thanks again

Hey, I figured it out. Wrapping variable with extern "C" block {} does not remove the mangling name. I have to use extern "C" as prefix on my variable declaration. This doesn't work extern "C" { const zend_function_entry GTPHP_HASH_GreenTea_Routes_methods[] = { ... }; } This works perfectly. extern "C" const zend_function_entry GTPHP_HASH_GreenTea_Routes_methods[] = { ... };

That was my understanding, but that's wrong.

This one still has mangling.

But this, doesn't have.

Yeah, it works too.

So what is the conclusion here?

So these are the recap of the above problem: 1. extern "C" {...} block doesn't work for variables, only works for functions. 2. We have to specify every variable definition whether a variable is external linkage or not.

It is a little bit complicated for me. Let me give an example to ask more detail Suppose, I have qwe.so and asd.so, they both are written in C++. qwe.so has extern "C" { int var_a = 1; } asd.so has extern int var_a; and they both are linked. If asd.so reads the value of var_a, then we can say that var_a in asd.so is reffered to other translation units?

Oh I see, I understand now.

This works, but gives a warning.

Yeah, thanks for the explanation.

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🙋‍♂