Separate one array with positive and negative numbers into two new ones

ｂｕｘｎａ

11/21/2023

One should have only positive numbers of the original one and the other only the negative ones. int[] array = { 12, 23, -22, -765, 43, 545, -4, -55, 43, 12, 351, -999, -87 }; i got this as an assignment, but i don't know how to do it, i guess they want me to use the for loop but i don't know how, we also didn't learn any other methods so i think this has to be as simple as it can be.

JJimmacle

11/21/2023

what do you think the first step could be?

ｂｕｘｎａ

11/21/2023

I literally don't know, i can write with the forreach loop and get all the negatives and positives sorted, but i don't know how to make new arrays i guess i would declare 2 new arrays one for pos one for neg

JJimmacle

11/21/2023

that sounds like a good place to start to me

ｂｕｘｎａ

11/21/2023

yes well what after that? i dont have a clue

JJimmacle

11/21/2023

try writing out the code that matches what you've explained so far it seems like you have a few clues already

ｂｕｘｎａ

11/21/2023

so i would use a for loop that checks every number if its greater or smaller than zero, and if its for example greater then it would put it in the new array that i declared

JJimmacle

11/21/2023

exactly

ｂｕｘｎａ

11/21/2023

thats what im thinking but im stuck i dont know what to write, how would it check if its greater than zero, and what would be the proper syntax for adding it to the already declared array i can write the basic for loop but beyond that im stuck i can write a for loop, then maybe nest a forreach in it, that works, but then what is the syntax for adding them to a new array

JJimmacle

11/21/2023

have you tried searching to find the syntax needed to express what you want? it sounds like you've already solved the problem, you just need to find how to write it in C#

ｂｕｘｎａ

11/21/2023

yesss i tried, but there are always some methods used, with which im familiar with because i've been learning C# on and off for a better part of a year, but i started this new course for the first time and i dont think they want me to use some of those methods that werent learned in the course

JJimmacle

11/21/2023

without knowing those restrictions i can't give you the right answers has the class not already taught you how to do the things you need to do to complete the assignment?

ｂｕｘｎａ

11/21/2023

it has, but only like the most basic all the loops, but not all the methods For example, the Array.Copy method has been taught how would you do it?

JJimmacle

11/21/2023

in addition to what you've already said you only need to add a couple counters to track the current index in each output array and an if statement using a comparison operator there's no advanced syntax or knowledge of methods needed

ｂｕｘｎａ

11/21/2023

i don't know how to write that out 😦

JJimmacle

11/21/2023

what specifically do you not know how to write? if it's more than one thing just pick one to start with it might help to write the actual code and just put comments in places you're stuck that will help me figure out where you're stuck at least

ｂｕｘｎａ

11/21/2023

how do you format written code on this server as in message i mean so it looks nice

JJimmacle

11/21/2023

$code

MMODiX

11/21/2023

To post C# code type the following: ```cs // code here ``` Get an example by typing $codegif in chat For longer snippets, use: https://paste.mod.gg/

ｂｕｘｎａ

11/21/2023

int[] array = { 12, 23, -22, -765, 43, 545, -4, -55, 43, 12, 351, -999, -87 };

            int[] arrayPos = {array.Length};
            int[] arrayNeg = {array.Length};

            for (int i = 0; i < array.Length; i++)
            {
                foreach (var a in array)
                {
                    if (a < 0) ;
                }
            }

int[] array = { 12, 23, -22, -765, 43, 545, -4, -55, 43, 12, 351, -999, -87 };

            int[] arrayPos = {array.Length};
            int[] arrayNeg = {array.Length};

            for (int i = 0; i < array.Length; i++)
            {
                foreach (var a in array)
                {
                    if (a < 0) ;
                }
            }

okay so this is how i would start i guess

JJimmacle

11/21/2023

so a couple things 1. that's not the correct syntax to create a new array, you should look that up 2. why do you have 2 loops?

ｂｕｘｎａ

11/21/2023

i guess, but how do declare new arrays if i dont know their lenght i could manually count the numbers but i dont think that is the right thing also for 2. i dont know any other way

Jjcotton42

11/21/2023

Make them as large as the origin array, or use List<int> instead

ｂｕｘｎａ

11/21/2023

cant use list so yeah array.length is good here?

Jjcotton42

11/21/2023

Yeah

ｂｕｘｎａ

11/21/2023

int[] array = { 12, 23, -22, -765, 43, 545, -4, -55, 43, 12, 351, -999, -87 };

            int[] arrayPos = {array.Length};
            int[] arrayNeg = {array.Length};

            for (int i = 0; i < array.Length; i++)
            {
                if (i > 0)
                {
                    
                }
            }

int[] array = { 12, 23, -22, -765, 43, 545, -4, -55, 43, 12, 351, -999, -87 };

            int[] arrayPos = {array.Length};
            int[] arrayNeg = {array.Length};

            for (int i = 0; i < array.Length; i++)
            {
                if (i > 0)
                {
                    
                }
            }

am i on the right track?

JJimmacle

11/21/2023

closer, but your array syntax is still incorrect https://learn.microsoft.com/en-us/dotnet/csharp/language-reference/builtin-types/arrays

ｂｕｘｎａ

11/21/2023

yes so how would i write it i cant find online?

JJimmacle

11/21/2023

it is very easy to find online, the top 2 results for "c# create new array" show it

Jjcotton42

11/21/2023

You couldn't find anything for "c# create array with a certain size"?

JJimmacle

11/21/2023

the reason i'm trying to get you to find it yourself is because lots of programming involves looking up how to do things so it's a good skill to develop early

ｂｕｘｎａ

11/21/2023

int[] arrayPos = new int[] {array.Length};

int[] arrayPos = new int[] {array.Length};

this good now?

JJimmacle

11/21/2023

you didn't even click my link, did you?

Jjcotton42

11/21/2023

Literally the first example answers your question @ｂｕｘｎａ Please read the resources provided to you

ｂｕｘｎａ

11/21/2023

wait im dumb i can just declare them like this? int[] arrayPos;

JJimmacle

11/21/2023

no again, please read the documentation i linked specifically the part of the example under // Declare a single-dimensional array of 5 integers.

ｂｕｘｎａ

11/21/2023

oh im really stupid int[] arrayNeg = new int[array.Length]; would it then in my case be like this?

JJimmacle

11/21/2023

yep

ｂｕｘｎａ

11/21/2023

because i cant just write a number thank you i was being stupid so how do i track them now and put the positives into the new array

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