C#•17mo ago

❔ inputing numbers into list

I want to imput numbers into a list until -1 typed... and then i would like to have it as variable so i can do what ever with it

127 Replies

Spekulant•17mo ago

using System;

namespace recodex_uloha;
class Program
{
    static void Main(string[] args)
    {
        
    }
}

class Inputer
{
    public static int ReadSymbol()
    {
        int symbol = Console.Read();
        int checker = '?';
        while ((symbol < '0') || (symbol > '9'))
        {

            checker = symbol;
            symbol = Console.Read();

        }
        int x = 0;

        while ((symbol >= '0') && (symbol <= '9'))
        {
            x = 10 * x + (symbol - '0');
            symbol = Console.Read();
        }
        if (checker == '-')
            x = -x;

        return x;
    }
}


class Zoznam
{
    static public int[] ZoznamImputer()
    {
        var numbers = new List<int>();
        int num = Inputer.ReadSymbol();
        while (num != -1)
        {
            numbers.Add(num);
            Inputer.ReadSymbol();

        }
        return numbers;
    }

using System;

namespace recodex_uloha;
class Program
{
    static void Main(string[] args)
    {
        
    }
}

class Inputer
{
    public static int ReadSymbol()
    {
        int symbol = Console.Read();
        int checker = '?';
        while ((symbol < '0') || (symbol > '9'))
        {

            checker = symbol;
            symbol = Console.Read();

        }
        int x = 0;

        while ((symbol >= '0') && (symbol <= '9'))
        {
            x = 10 * x + (symbol - '0');
            symbol = Console.Read();
        }
        if (checker == '-')
            x = -x;

        return x;
    }
}


class Zoznam
{
    static public int[] ZoznamImputer()
    {
        var numbers = new List<int>();
        int num = Inputer.ReadSymbol();
        while (num != -1)
        {
            numbers.Add(num);
            Inputer.ReadSymbol();

        }
        return numbers;
    }

hello yeah im flustrated that i cant do this basic thing but i get this error that nubers is not null here

Angius•17mo ago

Something not being null is unlikely to throw an error, something being null might

Spekulant•17mo ago

Angius•17mo ago

The one below is the actual error And it's quite a clear one

Spekulant•17mo ago

can i return a list

Angius•17mo ago

Sure can

Spekulant•17mo ago

well is var numbers defined as a list

Angius•17mo ago

It seems to be, yes Your method says it returns an int[] though

Spekulant•17mo ago

oh ok that solves the error btw how long have you been coding in c#

Angius•17mo ago

About 5 years or so?

Spekulant•17mo ago

you pref the language or you have other favourites

Angius•17mo ago

Yeah, C# would be my favourite. Although I quite enjoy PHP as well

Spekulant•17mo ago

do you study or work?

Pobiega•17mo ago

Mad man.

Angius•17mo ago

I work, as a teacher

Spekulant•17mo ago

oh nice at a uni?

Angius•17mo ago

One day hopefully, technical highschool for now

Pobiega•17mo ago

I've been coding in C# since 2003 and tbh, these days C# is so good its hard to use another language. I keep missing some feature or the other.

Spekulant•17mo ago

do you have some recommendation how can get into c# because its hard to write code for me...

Angius•17mo ago

Just making stuff tbh

Pobiega•17mo ago

coding is all about "learn by doing"

Angius•17mo ago

That's how I learned, picking random projects and googling them to completion or abandonment

Spekulant•17mo ago

yes but im asking for help every second well i have homework that i have to code in c# thats what im doing here we have to code in c# this semester i really like python its so straight forward and the code is simple but i dont have much experience with other languages

Pobiega•17mo ago

Python is okay for small scripts. Anything larger and it gets messy. Then again, last time I did anything with a larger python project was 5+ years ago. But my day to day job involves working with 500K+ LOC projects and thats where C# really shines, imho. I do like Rust and F# thou.

Spekulant•17mo ago

next year i should choose subjects at uni like programming in .... i will prob look into CPP or c#,java,rust will see how can i set brake points in visual studio?

Pobiega•17mo ago

did you fix the bug in the code btw?

static public int[] ZoznamImputer()
    {
        var numbers = new List<int>();
        int num = Inputer.ReadSymbol();
        while (num != -1)
        {
            numbers.Add(num);
            Inputer.ReadSymbol();

        }
        return numbers;
    }

static public int[] ZoznamImputer()
    {
        var numbers = new List<int>();
        int num = Inputer.ReadSymbol();
        while (num != -1)
        {
            numbers.Add(num);
            Inputer.ReadSymbol();

        }
        return numbers;
    }

Spekulant•17mo ago

Angius•17mo ago

$debug

MODiX•17mo ago

https://docs.microsoft.com/en-us/visualstudio/get-started/csharp/tutorial-debugger?view=vs-2022

Tutorial: Debug C# code - Visual Studio (Windows)

Learn features of the Visual Studio debugger and how to start the debugger, step through code, and inspect data in a C# application.

Angius•17mo ago

Ah oof ouch owie my bones VS4Mac

Spekulant•17mo ago

ye i do use mac

Pobiega•17mo ago

VS for mac is not the same thing as VS, just so you are aware. Im sure it can debug, but its... quite a different experience over all

Angius•17mo ago

Since you're a student, do yourself a solid and get a free Rider license $freerider

MODiX•17mo ago

There are two ways to get Rider for free: Being a student: https://www.jetbrains.com/community/education/#students Using it for an OSS project: https://www.jetbrains.com/community/opensource/#support

Pobiega•17mo ago

^ Rider is excellent.

Angius•17mo ago

Infinitely better than VS4Mac

Spekulant•17mo ago

well is it that much better for writing code like im doing

Pobiega•17mo ago

Yes 🙂

Angius•17mo ago

I'd say so

Pobiega•17mo ago

and as a student its entirely free.

Spekulant•17mo ago

i also saw that sealion is there for writting cpp now im using xcode for it

Angius•17mo ago

Yeah, CLion

Pobiega•17mo ago

yep, thats jetbrains C/C++ IDE the good thing about jetbrains IDEs is that they are very similar learn one, you more or less know the rest

Spekulant•17mo ago

but like for python i use visual studio code and not pycharm

Angius•17mo ago

There's also IntelliJ for Java and Kotlin

Pobiega•17mo ago

I use Rider for C#, IntelliJ for java, CLion for Rust

Angius•17mo ago

Etc

Spekulant•17mo ago

dont know it is overwhelming and i dont need that much features for my python code like im doing BFS chill pycharm. some people write much harder code in vim without the features

Angius•17mo ago

Masochists and 70-year-old fossils, yes

Pobiega•17mo ago

vim has plenty of features btw

Angius•17mo ago

"Me grandaddy wrote with clay tablets and 's was good"

Pobiega•17mo ago

it has autocomplete, debugging, language server support, project management, file browser... its just that its a fucking nightmare to setup properly 😄 ive even seen code coverage visualization in vim which is just... why?

Angius•17mo ago

After the first gigabyte of config files Vim just turns into an ugly IDE, yeah

Pobiega•17mo ago

yep tooling helps you write faster, and when it comes to C# specifically, autocomplete and intellisense is a godsend and some stuff, like Riders built in ReSharper, can even help you write better

Angius•17mo ago

Yeah, I love how Rider points out "hey, did you know you could write it better?" lol

Spekulant•17mo ago

well maybe it will help will see im downloading it probably in a minute

Pobiega•17mo ago

just fyi, unless you've changed it you still have a bug in

static public int[] ZoznamImputer()
    {
        var numbers = new List<int>();
        int num = Inputer.ReadSymbol();
        while (num != -1)
        {
            numbers.Add(num);
            Inputer.ReadSymbol();

        }
        return numbers;
    }

static public int[] ZoznamImputer()
    {
        var numbers = new List<int>();
        int num = Inputer.ReadSymbol();
        while (num != -1)
        {
            numbers.Add(num);
            Inputer.ReadSymbol();

        }
        return numbers;
    }

and if you want to get your hands dirty and do some projects, it wont hurt to have this list: $projects

MODiX•17mo ago

Collections of application ideas that anyone can solve in any programming language to improve coding skills: https://github.com/ZacharyPatten/dotnet-console-games https://github.com/karan/Projects https://github.com/florinpop17/app-ideas

Spekulant•17mo ago

class Zoznam
{
    static public List<int> ZoznamImputer()
    {
        var numbers = new List<int>();
        int num = Inputer.ReadSymbol();
        while (num != -1)
        {
            numbers.Add(num);
            Inputer.ReadSymbol();

        }
        return numbers;
    }
}

class Zoznam
{
    static public List<int> ZoznamImputer()
    {
        var numbers = new List<int>();
        int num = Inputer.ReadSymbol();
        while (num != -1)
        {
            numbers.Add(num);
            Inputer.ReadSymbol();

        }
        return numbers;
    }
}

Pobiega•17mo ago

still has the bug 🙂

Spekulant•17mo ago

ye should i copy yours?

Pobiega•17mo ago

nope, mine is just your old one I want you to read it and think carefully about num 🙂

Spekulant•17mo ago

well it doesnt scream at me anymore

Pobiega•17mo ago

screaming is because of errors this has a bug. the IDE wont catch bugs you'll have to do that on your own 🙂

Spekulant•17mo ago

is it something with the order of me doing things

Pobiega•17mo ago

nope, its related to num and specifically how it never changes value 🙂

Spekulant•17mo ago

oh uye

class Zoznam
{
    static public List<int> ZoznamImputer()
    {
        var numbers = new List<int>();
        int num = Inputer.ReadSymbol();
        while (num != -1)
        {
            numbers.Add(num);
            num = Inputer.ReadSymbol();

        }
        return numbers;
    }

class Zoznam
{
    static public List<int> ZoznamImputer()
    {
        var numbers = new List<int>();
        int num = Inputer.ReadSymbol();
        while (num != -1)
        {
            numbers.Add(num);
            num = Inputer.ReadSymbol();

        }
        return numbers;
    }

Pobiega•17mo ago

there ya go.

Spekulant•17mo ago

also when i want to print a list do i have to do it with a for loop probably cant to console.write(numbers) thats what i did only writes stuff about the object

Pobiega•17mo ago

loop, or string.Join I prefer string join

Spekulant•17mo ago

what you mean about sting.join like change the list of integers into a string and then join it and print it out

Pobiega•17mo ago

no there is a method called string.join that lets you turn a list into a string

Pobiega•17mo ago

https://learn.microsoft.com/en-us/dotnet/api/system.string.join?view=net-7.0

String.Join Method (System)

Concatenates the elements of a specified array or the members of a collection, using the specified separator between each element or member.

Spekulant•17mo ago

@Pobiega

Spekulant•17mo ago

do i have to install any of these

Pobiega•17mo ago

nope

Spekulant•17mo ago

also string.join is super nice that i dont have to do the forloop i do hate this overwhelming IDE's its like when you open adobe programs or unity they offer ton but its a lot Do you have some tips that i should use with rider the new test UI looking better tho then standart

Pobiega•17mo ago

no tips and tricks other than to... use the IDE use the reference finder, use go to def, use the refactoring helper

Spekulant•17mo ago

static public int MaximumNum(List<int> num_list)
    {
        int temp = num_list[0];
        for (int i = 0; i < num_list.count(); i++)
        {
            if (num_list[i] > temp)
            {
                temp = num_list[i];
            }
        }

        return temp;

static public int MaximumNum(List<int> num_list)
    {
        int temp = num_list[0];
        for (int i = 0; i < num_list.count(); i++)
        {
            if (num_list[i] > temp)
            {
                temp = num_list[i];
            }
        }

        return temp;

i thout that i could use .count() for list

Pobiega•17mo ago

no, Count counts you want Max

Spekulant•17mo ago

hmm i just want to know the size of the list so the for loop knows when to end

Pobiega•17mo ago

uhm

Spekulant•17mo ago

i mean if there is a function max that will print max val in a list sure i will use that

Pobiega•17mo ago

you can skip the entire loop by using Max

Spekulant•17mo ago

okey i will do that but i would like to solve that issue also do i use count in a bad way

Pobiega•17mo ago

well its called Count(), not count 🙂

Spekulant•17mo ago

        Console.Write(Zoznam.ZoznamImputer().Max());

        Console.Write(Zoznam.ZoznamImputer().Max());

yep this line did the job

Pobiega•17mo ago

yup

Spekulant•17mo ago

https://tenor.com/view/alex-jones-gif-14367651

Tenor

Pobiega•17mo ago

typical things the IDE should help you with

Spekulant•17mo ago

skuska.cs(43,19): error CS0246: The type or namespace name 'List<>' could not be found (are you missing a using directive or an assembly reference?)

skuska.cs(43,19): error CS0246: The type or namespace name 'List<>' could not be found (are you missing a using directive or an assembly reference?)

im uploading a file to a thing that runs tests on it

Pobiega•17mo ago

¯\_(ツ)_/¯ if you have a using System.Collections.Generic; in the file, that should work

Spekulant•17mo ago

well it did not hmm

Pobiega•17mo ago

can you show your complete code?

Spekulant•17mo ago

oh my bad it did

Program.cs(9,46): error CS1061: 'List<int>' does not contain a definition for 'Max' and no accessible extension method 'Max' accepting a first argument of type 'List<int>' could be found (are you missing a using directive or an assembly reference?)

Program.cs(9,46): error CS1061: 'List<int>' does not contain a definition for 'Max' and no accessible extension method 'Max' accepting a first argument of type 'List<int>' could be found (are you missing a using directive or an assembly reference?)

new error tho

using System;
using System.Collections.Generic;

namespace recodex_uloha;
class Program
{
    static void Main(string[] args)
    {
        Console.Write(Zoznam.ZoznamImputer().Max());
        
    }
}

class Inputer
{
    public static int ReadSymbol()
    {
        int symbol = Console.Read();
        int checker = '?';
        while ((symbol < '0') || (symbol > '9'))
        {

            checker = symbol;
            symbol = Console.Read();

        }
        int x = 0;

        while ((symbol >= '0') && (symbol <= '9'))
        {
            x = 10 * x + (symbol - '0');
            symbol = Console.Read();
        }
        if (checker == '-')
            x = -x;

        return x;
    }
}


class Zoznam
{
    static public List<int> ZoznamImputer()
    {
        var numbers = new List<int>();
        int num = Inputer.ReadSymbol();
        while (num != -1)
        {
            numbers.Add(num);
            num = Inputer.ReadSymbol();

        }
        return numbers;
    }

}

using System;
using System.Collections.Generic;

namespace recodex_uloha;
class Program
{
    static void Main(string[] args)
    {
        Console.Write(Zoznam.ZoznamImputer().Max());
        
    }
}

class Inputer
{
    public static int ReadSymbol()
    {
        int symbol = Console.Read();
        int checker = '?';
        while ((symbol < '0') || (symbol > '9'))
        {

            checker = symbol;
            symbol = Console.Read();

        }
        int x = 0;

        while ((symbol >= '0') && (symbol <= '9'))
        {
            x = 10 * x + (symbol - '0');
            symbol = Console.Read();
        }
        if (checker == '-')
            x = -x;

        return x;
    }
}


class Zoznam
{
    static public List<int> ZoznamImputer()
    {
        var numbers = new List<int>();
        int num = Inputer.ReadSymbol();
        while (num != -1)
        {
            numbers.Add(num);
            num = Inputer.ReadSymbol();

        }
        return numbers;
    }

}

Pobiega•17mo ago

.. do you have a using System.Linq;?

Spekulant•17mo ago

this is my code nope

Pobiega•17mo ago

ah, you probably are using globals remove your global includes file its messing it up for the external system

Spekulant•17mo ago

i do not know what you talking about also how do i know what to write like using this and that

Pobiega•17mo ago

the IDE should help you, but its not, because in your project its already included via a global using or implicit using show me your .csproj file and a screenshot of the solution explorer

Spekulant•17mo ago

Pobiega•17mo ago

ok, no globals.cs so rightclick the project (green icon, recodex_uloha) and click "edit .csproj"

Spekulant•17mo ago

Pobiega•17mo ago

remove the <ImplicitUsings> that entire line must go

Spekulant•17mo ago

ok i did what does it do

Pobiega•17mo ago

it adds a bunch of standard using statements to each file at compile time

Spekulant•17mo ago

it worked

Pobiega•17mo ago

like the ones your program was using 🙂

Spekulant•17mo ago

ok so now i have to like manually write what im using

Pobiega•17mo ago

yes

Spekulant•17mo ago

at the top

Pobiega•17mo ago

but your IDE will help you if you just type "List<" Rider will suggest to include the generic namespace same for .Max()

Spekulant•17mo ago

Spekulant•17mo ago

well it shows this when i delete the using linq

Pobiega•17mo ago

you cant just write it there thou :p like, use the type in your code

Spekulant•17mo ago

Pobiega•17mo ago

in a valid location yes like so

Spekulant•17mo ago

thats nice can i have more programs like Program.cs in one project

Pobiega•17mo ago

yes and no yes, but not as you think

Spekulant•17mo ago

Pobiega•17mo ago

you can only have one static Main() method

Spekulant•17mo ago

so i cant use project as a folder okey

Pobiega•17mo ago

you can have multiple projects thou or do what I do

Pobiega•17mo ago

Pobiega•17mo ago

each of those folders is a "new project" and in Program.cs all I do is "run" the project I really want so its actually just one real project, but each folder is its own contained namespace with a Program class that has a static Run method

Spekulant•17mo ago

oh nice

Accord•17mo ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

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❔ inputing numbers into list