int arr[] = {2,3,5}; //Modifying for( auto &num: arr) num = 5; //Printing for(auto const &num: arr) cout << num; This is someone's code. I'm a little confused at the printing part He could have just use a normal range base for loop for the printing without referencing but he didn't? What's the benefit of using reference and const over using general for range based for to print the nums

Hi, New in C I am trying to write "Il y a 15% de reussite" I have : printf ("il y a %d de reussite. \n",res); But i don't know how to put the % symbol without having warnings and bad results. I searched on the web but you only find HOW tu use % 🤣 but not how to neutralise it... Any help ? Tks

Int

Does anyone know how you can use variables and files from file pointers from one c file in another c file?

Pls who knows how to create a telegram bot

I wouldn't recommend c or c++ for telegram bot, try python or something like that

why not c or c++? because of libraries?

well... you will have to deal with low level stuff, if you are fine what then you can use even assembler or what not... but you will spend more time thinking about the programming language rather than what you want to program

Klimi ding dong leni hai

Is there a way we share our small program to someone and not as an output but as a program (like an apk)?

well you can share compiled executables if you wanted... or as the source code

I want to share the program like if my program is ex - Enter number : 2 Enter number again : 2 And then it scans and give the answer 4

Build the executable (what kind of executable depends on the platform, on windows it's *.exe) and share it

Are you trying to say that save your code in a file and then rename file to .apk or .exe?

No, when you run your code, what usually happens is that the compiler and linker build an executable, save it somewhere and run it. You just need either to find where it built to and copy it, or make it build to the location you want. How, depends on what IDE you use. If you use online IDE for example you can't do that, because the executable is stored on the server side.

Ohh no

You need to install a compiler to your machine, if you don't have it

Yes dude i have it but i use online ide

Hello guys i was writing some codes and i am bit confused how 1%10 equal to 1 isn't its should 0

Hi, I'm reading stuff from a file using fgets: while(fgets(buff, sizeof(buff), fp)){ fprintf(stdout, "this is buff %s and this is lenght %ld\n", buff, strlen(line)); // Remove the \n at the end: buff[strlen(buff) - 1])= 0; fprintf(stdout, "This is buff without new_line: %s and this is lenght: %ld\n", buff, strlen(line)); } So this is the problem. I know the string he reads is 10 char long (there's no doubt about it). Since strlen does not count NULL terminating carachter, I expected, at first print, lenght= 11, instead it prints lenght= 12. After I remove the \n, the lenght is 11. But now I'm confused, as I don't understand what the last carachter is. If it's not \0 and not \n, since I got rid of it, what is it? Could you please help? Thanks! Inside the file I've got written: 1a2b3c4e5d And in another file I've got written the same thing: const char *ESCAPE= "1a2b3c4e5d"; The endgoal would be to do if(strcmp(buff, ESCAPE)==0), but it's never true, as ESCAPE has lenght 10 and there's something more in buff that makes its lenght 11

Just copy your code to a file, name it something like yourprogram.cpp and run the command that TheAcelot mentioned above (assuming your compiler is mingw)

Is it guaranteed that capacity() of a vector will be equal to the value passed to reserve() when reserve called on a freshly created empty vector?

Hi, New in C I am trying to write "Il y a 15% de reussite" I have : printf ("il y a %d de reussite. \n",res); But i don't know how to put the % symbol without having warnings and bad results. I searched on the web but you only find HOW tu use % 🤣 but not how to neutralise it... Any help ? Tks

Hi, is it possible to create your own signals in C? Like, usually you write signal(SIGINT, SIGINT_HANDLER) so whenever the user presses CTRL+C the actual routine will pass the control to a subroutine which is the handler that will do stuff before returning the control to the upper routine. I need to do something like, but I need to create my own signal. Like, when the user presses CTRL+SHIFT+R, the signal function shall recognize this as a signal and therefore call a handler. Is it possible to do so?