If I want to create an array (in C++) of which at the beginnin I don't know its length, how can I do ? Exist a way to do that ?

Answer 1

In C++ array must have compile-time length. So You should use dynamic array (Dynamically Allocated Array).

int size;
int *arr = NULL;
cin >> size;
a = new int[size];
...
delete[] a;

if you write:
int arr[size];
where size is a variable and not a constant at compile-time it won't compile.

Answer 2

@LorenzoZanetti You're welcome. Good luck.

Answer 3

@anu I don't understand the challenge well. I mean If he wants to write an IRC server/client so there shouldn't be any problem. You write that code in server. For example you write a server program with socket programming and then listen to a port and use IRC protocol to communicate. so you have a server and you can give any services or calculation you want to the clients. I saw the challenge page and I saw some similar answers.

BTW @LorenzoZanetti I apologize for putting a long answer to your question that is not related to your question. Sorry :)

Answer 4

Thanks very much !

Answer 5

@developer do not worry it's not a problem ! ;)

Answer 6

[UNSOLVED] How to make an auto reply program for a private chat bot on IRC?

https://client01.chat.mibbit.com/?url=irc%3A%2F%2Firc.root-me.org%3A6667%2Froot-me_challenge

For example if we send private chat to a bot named Candy:
!ep1

that bot reply two number.
<number1>/<number2>

how to make an auto reply of calculation result to Candy bot:

calculate the square root of the number1 and multiply the result by the number2. Then round to two decimals.
For example in C++:
printf("%0.2f", sqrt(number1)*number2);

feel free to use any programming language.

i am expecting solution for this from u , as posted in Q&A soloearn today @developer