C#•2y 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

SpekulantOP•2y 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•2y ago

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

SpekulantOP•2y ago

Angius•2y ago

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

SpekulantOP•2y ago

can i return a list

Angius•2y ago

Sure can

SpekulantOP•2y ago

well is var numbers defined as a list

Angius•2y ago

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

SpekulantOP•2y ago

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

Angius•2y ago

About 5 years or so?

SpekulantOP•2y ago

you pref the language or you have other favourites

Angius•2y ago

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

SpekulantOP•2y ago

do you study or work?

Pobiega•2y ago

Mad man.

Angius•2y ago

I work, as a teacher

SpekulantOP•2y ago

oh nice at a uni?

Angius•2y ago

One day hopefully, technical highschool for now

Pobiega•2y 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.

SpekulantOP•2y ago

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

Angius•2y ago

Just making stuff tbh

Pobiega•2y ago

coding is all about "learn by doing"

Angius•2y ago

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

SpekulantOP•2y 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•2y 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.

SpekulantOP•2y 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•2y 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;
    }

SpekulantOP•2y ago

Angius•2y ago

$debug

MODiX•2y 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•2y ago

Ah oof ouch owie my bones VS4Mac

SpekulantOP•2y ago

ye i do use mac

Pobiega•2y 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•2y ago

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

MODiX•2y 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•2y ago

^ Rider is excellent.

Angius•2y ago

Infinitely better than VS4Mac

SpekulantOP•2y ago

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

Pobiega•2y ago

Yes 🙂

Angius•2y ago

I'd say so

Pobiega•2y ago

and as a student its entirely free.

SpekulantOP•2y ago

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

Angius•2y ago

Yeah, CLion

Pobiega•2y 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

SpekulantOP•2y ago

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

Angius•2y ago

There's also IntelliJ for Java and Kotlin

Pobiega•2y ago

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

Angius•2y ago

Etc

SpekulantOP•2y 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•2y ago

Masochists and 70-year-old fossils, yes

Pobiega•2y ago

vim has plenty of features btw

Angius•2y ago

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

Pobiega•2y 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•2y ago

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

Pobiega•2y 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•2y ago

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

SpekulantOP•2y ago

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

Pobiega•2y 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•2y 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

SpekulantOP•2y 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•2y ago

still has the bug 🙂

SpekulantOP•2y ago

ye should i copy yours?

Pobiega•2y ago

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

SpekulantOP•2y ago

well it doesnt scream at me anymore

Pobiega•2y ago

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

SpekulantOP•2y ago

is it something with the order of me doing things

Pobiega•2y ago

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

SpekulantOP•2y 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•2y ago

there ya go.

SpekulantOP•2y 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•2y ago

loop, or string.Join I prefer string join

SpekulantOP•2y 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•2y ago

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

Pobiega•2y 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.

SpekulantOP•2y ago

@Pobiega

SpekulantOP•2y ago

do i have to install any of these

Pobiega•2y ago

nope

SpekulantOP•2y 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•2y ago

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

SpekulantOP•2y 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•2y ago

no, Count counts you want Max

SpekulantOP•2y ago

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

Pobiega•2y ago

uhm

SpekulantOP•2y ago

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

Pobiega•2y ago

you can skip the entire loop by using Max

SpekulantOP•2y ago

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

Pobiega•2y ago

well its called Count(), not count 🙂

SpekulantOP•2y ago

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

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

yep this line did the job

Pobiega•2y ago

yup

SpekulantOP•2y ago

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

Tenor

Pobiega•2y ago

typical things the IDE should help you with

SpekulantOP•2y 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•2y ago

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

SpekulantOP•2y ago

well it did not hmm

Pobiega•2y ago

can you show your complete code?

SpekulantOP•2y 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•2y ago

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

SpekulantOP•2y ago

this is my code nope

Pobiega•2y ago

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

SpekulantOP•2y ago

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

Pobiega•2y 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

SpekulantOP•2y ago

Pobiega•2y ago

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

SpekulantOP•2y ago

Pobiega•2y ago

remove the <ImplicitUsings> that entire line must go

SpekulantOP•2y ago

ok i did what does it do

Pobiega•2y ago

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

SpekulantOP•2y ago

it worked

Pobiega•2y ago

like the ones your program was using 🙂

SpekulantOP•2y ago

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

Pobiega•2y ago

yes

SpekulantOP•2y ago

at the top

Pobiega•2y ago

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

SpekulantOP•2y ago

SpekulantOP•2y ago

well it shows this when i delete the using linq

Pobiega•2y ago

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

SpekulantOP•2y ago

Pobiega•2y ago

in a valid location yes like so

SpekulantOP•2y ago

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

Pobiega•2y ago

yes and no yes, but not as you think

SpekulantOP•2y ago

Pobiega•2y ago

you can only have one static Main() method

SpekulantOP•2y ago

so i cant use project as a folder okey

Pobiega•2y ago

you can have multiple projects thou or do what I do

Pobiega•2y ago

Pobiega•2y 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

SpekulantOP•2y ago

oh nice

Accord•2y 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