Function declaration looks like ret name(args); You dont have ret piece in your code

If these lines are calling functions, as I said its forbidden to call functions without declaring anything in global scope

If these lines are calling functions, as I said its forbidden to call functions without declaring anything in global scope

so You mean I have to call my function after int main()?

Inside main or inside other functions

I have 4k.h in which I give all the prototype

now I get these error

I declared all of them inside my 4k.h

Show main code

Whats pF? It is not declared anywhere

Other errors are same

No it does not

Its shown in the guide (when I lastly installed gentoo)

Its shown in the guide (when I lastly installed gentoo)

That does NOT mean it is done by default

That does NOT mean it is done by default

Sure if you want it that way

That does NOT mean it is done by default

By default the system isn't even working btw

Whats pF? It is not declared anywhere

is a pointer type Gtkwidget

Whats pF? It is not declared anywhere

I declared in function in its file but in main this pointer called window_pointer I fixed

int a[4] = {1,2,3,4}; int b[4] = {1,2,3,4}; int n = &b[3] - &a[2]; Value of n is 5. Any logic behind this, or does it vary between compilers?

It'll often generate worse performing code

i would very much like some auto-vectorisation black magic when dealing with a hundred thousand floats

Even on android we specifically target code written for the CPU to begin with and only compile that with -march=native

also on Android does -march=native even make sense? isn't ARM instruction set basically fixed?

also on Android does -march=native even make sense? isn't ARM instruction set basically fixed?

(compared to x86 where there are new ways of doing SIMD every two intel generations)

int a[4] = {1,2,3,4}; int b[4] = {1,2,3,4}; int n = &b[3] - &a[2]; Value of n is 5. Any logic behind this, or does it vary between compilers?

You cannot subtract 2 random pointers and expect to get meaningful result

And yes it may vary

You cannot subtract 2 random pointers and expect to get meaningful result

Yes, I was thinking the same. Thank you.

I'm just going to start c can anyone tell me how to do it

Any code

Done🙂

Hello, does anyone know a site where I magician types of different tasks with c ++ and their solution

What do you mean?

Oh quests based learning or some stuff?

Hey everyone, can anyone tell me why is the output of this code is not the same every time? i know that the fork will create a child process but i couldn't understand the output!

check your OS if order of child/parent process execution is specified after fork

check your OS if order of child/parent process execution is specified after fork

how is that? i don't think it is about my OS because i had the same issue when i compiled the code in online debugging websites

show your different output

I know the possible reason: you have several processes, so OS can decide which process to run "randomly"

but you have small program, so it should be the case every time, if OS is not heavy loaded

you have not checked : int i = 1; printf("i = %d\n", i); fork();

so after this fork both child and parent process creates new child

thus, order of execution is not specified

ah okay thanks for the help👍🏻

I have such a task, but I do not know which algorithm I need to use here,who can help

Write a program that gets a natural number N (N ≤ 1000) at the input, then a sequence of N characters. As a result, the program must display the digits of the sequence and then the remaining characters. The displayed characters must be separated by a space. Use array to solve the problem.

#include <iostream> int main() { int N; std::cin >> N; int arr[1000]; for( int i = 0; i < N; i++){ std::cin >> arr[i]; }

I have such a task, but I do not know which algorithm I need to use here,who can help

Some stuff doesn't need predefined algorithms

Use your brain

I'm trying and just starting to learn

also on Android does -march=native even make sense? isn't ARM instruction set basically fixed?

It does

Iam trying to understand myself from a weak but I need some help,please

Iam trying to understand myself from a weak but I need some help,please

Please explain this in a simple way

Iam trying to understand myself from a weak but I need some help,please

n % 10 gets only last element.. Example: 102 % 10 gives 2 And its storing that value into digit variable.. and then it checks whether it's repeated or not using bool n/10 removes last element...

I can't understand " if(digitseen[digit]) " what is it mean

Array subscripts always start at zero... so the elements are digitseen[0], digitseen[1].. digitseen[9].

Lets take example: 12341 digitseen [10] is false.. means from 0 to 9 is false. 12341%10 = 1(digit) Now if condition is false, cz you have declared digitseen[10] is false.. Now digitseen[1] is true... this means digitseen[0] is false digitseen[1] is true and others are false... 12341/10 = 1234 Again loop starts with 1234 1234%10 = 4(digit) Again if condition is false cz, digitseen[4] is false So digitseen[4] becomes true 1234/10 = 123 Repeats till 1 comes... While checking condition for element 1... If digitseen[1] is already true so it breaks..

Now you understand?

anyone can you check it?

#include <iostream> int main() { int N; std::cin >> N; int arr[1000]; for( int i = 0; i < N; i++){ std::cin >> arr[i]; } for (int i = 0; i < 1000-1; ++i) { std::cout << N << " "; } }

i guess that's wrong

Write a program that gets a natural number N (N ≤ 1000) at the input, then a sequence of N characters. As a result, the program must display the digits of the sequence and then the remaining characters. The displayed characters must be separated by a space. Use array to solve the problem.

transform(sample.begin(), sample.end(), sample.begin(), [](char c) -> char{return c == 'y' ? 'x' : 'y';});

What is happening in the last parameter?

"[](char c) -> char{}

What is the meaning of this expression?

What is the meaning of this expression?

https://docs.microsoft.com/en-us/cpp/cpp/lambda-expressions-in-cpp?view=vs-2019

Hey everyone, can anyone tell me why is the output of this code is not the same every time? i know that the fork will create a child process but i couldn't understand the output!

you need to check the return of the fork to see if it's the child or the parent and decide what to do

accumulate(something.begin(), something.end(), string("")) What is the string("") parameter doing?

accumulate(something.begin(), something.end(), string("")) What is the string("") parameter doing?

empty stl string

"[](char c) -> char{}

lambda function captures nothing takes one character parameter is expected to return a character but does not have a return statement in it, thus error there's nothing in the back does nothing

Now you understand?

Thanks

accumulate(something.begin(), something.end(), string("")) What is the string("") parameter doing?

Accumulator initializer

On line 52 there should be sizeof(char*)

Line 85 leaks memory btw

Look at 85

It frees end of pointer array, but does not free memory pointed to by them

You leak some of what you calloced at 55

Yes

Use debugger, track pointer values

Why does returning a pointer to a local variable yield undefined behavior ?

Why does returning a pointer to a local variable yield undefined behavior ?

It doesn't

from a function

Using the pointer is UB