Should I use for loop?

Should I use for loop?

I suppose so, judging by the information you provided.

/get cbool

/get cbool

/get cbook

anyone to teach me how to run windows files on mac?

I want to write a command line interface program in c that will run all the time, how do I achieve that?

The purpose of the program is to catch specific characters/expressions I write and execute them for me

The purpose of the program is to catch specific characters/expressions I write and execute them for me

Make an infinite loop while(true) and process your commands inside it.

Make an infinite loop while(true) and process your commands inside it.

Just make sure to not fall into the trap of infinite loop without side effects

Make an infinite loop while(true) and process your commands inside it.

I will always have to run this program though

Usually I put volatile bool just to be safe

I just want to write a program that auto-translate chars I write in my language to English when I type them by mistake

I don't want to execute a program each time I open my terminal

Usually I put volatile bool just to be safe

I mean more like something like this while (true) { bool isExitSignal = processCommandBlocking(); if (isExitSignal) return; }

I mean more like something like this while (true) { bool isExitSignal = processCommandBlocking(); if (isExitSignal) return; }

In this case you must be sure that this function would produce side effects

Where process command is something like reading from cin and ifelseif

What if it is pure and doesn't?

And you can't tell by reading this snippet alone

In this case you must be sure that this function would produce side effects

For sure, if it doesn't produce side effects (e.g. outputs results to the console) it is not particularly useful :)

For sure, if it doesn't produce side effects (e.g. outputs results to the console) it is not particularly useful :)

Producing output to console IS side effect tho

It changes the global state

But my question is how I achieve the condition where I type in terninal: "cookie" and the program writes for me "milk". I know how to achieve that by doing: ./myProg cookie But how do I skip that stage?

But my question is how I achieve the condition where I type in terninal: "cookie" and the program writes for me "milk". I know how to achieve that by doing: ./myProg cookie But how do I skip that stage?

As I said already, you need to run your program in an infinity loop where on each iteration it will read from the console, calculate and print the result

anyone knows about sql here?

anyone knows about sql here?

Ask

As I said already, you need to run your program in an infinity loop where on each iteration it will read from the console, calculate and print the result

Thank you, I will try it, just thought there might be some more efficient way to do it

Because I want it to run without me activating the program every time

anyone knows about sql here?

@en_it_chats

Because I want it to run without me activating the program every time

Make it a daemon

Thank you, I will try it, just thought there might be some more efficient way to do it

If your read from console is blocking, there won't be any work done in between inputs (the app will be waiting for input), so it is not particularly inefficient

with dept_num

This is not a correct chat to ask about SQL

Is SQL allowed here?

Ask

:)

Make it a daemon

That is the word I was looking for. Thank you!

ok sorry anyway

:)

Who knew, your question may have been related to C/C++

if someone could help dm please

you can ask about sql in the offtopic group

I suppose so, judging by the information you provided.

Thank you, I get what I want

hi there! guys, can i get C++ ebook here?

Is SQL allowed here?

No, only C, C++

hi there! guys, can i get C++ ebook here?

Amazon.com

Hey guys, I have written a program with if statement, and at the end I want to ask for continuing at the same time i want if i write like answer Y or y it starts again but n or N it stops , how can i do it?

Hey guys, I have written a program with if statement, and at the end I want to ask for continuing at the same time i want if i write like answer Y or y it starts again but n or N it stops , how can i do it?

use a while loop

use a while loop

What should I write inside while loop?

What should I write inside while loop?

try it yourself first

uint32_t myInt = 123456; std::cout << std::setfill('0') << std::setw(8) << std::hex << myInt << '\n';

Anyone knows how to write it into string variable?

Anyone knows how to write it into string variable?

create an std::ostringstream from your std::string and store with that. alternatively, use std::format_to (fmt::format_to in fmtlib) for a more modern solution.

Thanks)

Thanks)

corrected a small mistake

site for solving problems especially Pointer (C) ?

Hi, how does this work without segfault? int main() { char *m = (char*)main; strcpy(m, "Hello world!"); puts(m); }

Hi, how does this work without segfault? int main() { char *m = (char*)main; strcpy(m, "Hello world!"); puts(m); }

It's undefined behavior

It can work any way

It can format your drive

It's undefined behavior

Yeah but I wonder… Why is there no segfault trying to overwrite the currently executed function

and isn't it in read-only memory?

Yeah but I wonder… Why is there no segfault trying to overwrite the currently executed function

Because it's undefined behavior

Because it's undefined behavior

Which is not a proper explaination lol

Which is not a proper explaination lol

It is the ONLY explanation

Hi, how does this work without segfault? int main() { char *m = (char*)main; strcpy(m, "Hello world!"); puts(m); }

It would overwrite .text section. If your .text section is writable, it's probably not segfault.

It would overwrite .text section. If your .text section is writable, it's probably not segfault.

Ah okay, so basically it makes use of improper protection?

It segfault from my end anyway: ammarfaizi2@integral:/tmp$ cat > qwe.c int main() { char *m = (char*)main; strcpy(m, "Hello world!"); puts(m); } ammarfaizi2@integral:/tmp$ gcc qwe.c -o qwe qwe.c: In function ‘main’: qwe.c:3:9: warning: implicit declaration of function ‘strcpy’ [-Wimplicit-function-declaration] 3 | strcpy(m, "Hello world!"); | ^~~~~~ qwe.c:3:9: warning: incompatible implicit declaration of built-in function ‘strcpy’ qwe.c:1:1: note: include ‘<string.h>’ or provide a declaration of ‘strcpy’ +++ |+#include <string.h> 1 | int main() { qwe.c:4:9: warning: implicit declaration of function ‘puts’ [-Wimplicit-function-declaration] 4 | puts(m); | ^~~~ ammarfaizi2@integral:/tmp$ ./qwe Segmentation fault (core dumped) ammarfaizi2@integral:/tmp$

Ah okay, so basically it makes use of improper protection?

Probably, how did you compile that?

Ah okay, so basically it makes use of improper protection?

And due to the CPU cache it still executes fine

right?

Probably, how did you compile that?

tcc -run

So you like offtoping, right?

And due to the CPU cache it still executes fine

I don't think so, there is called PT_GNU_STACK that determines the permission of these sections.

tcc -run

I don't have tcc, so IDK.

So you like offtoping, right?

It's still discussing C, calm.

I don't have tcc, so IDK.

tcc basically can run the executable from memory

tcc basically can run the executable from memory

ohh yep, reexecuting the function at the end then causes segfault

int main() { char *m = (char*)main; strcpy(m, "Hello world! This is a test!"); puts(m); main(); } Results in: Hello world! This is a test! Segmentation fault

It's still discussing C, calm.

it's not a valid C program because it has UB, so it's not C https://t.me/programminginc/374520

it's not a valid C program because it has UB, so it's not C https://t.me/programminginc/374520

even if it is not a valid C program it is still a C program, but… Invalid lol

A broken keyboard is still a keyboard even though it does not work