Console always showing the same error message when trying to Run

Problem description:

I’m doing execices by OpenClassroom to learn C# but there is the same bug with every exercice, everytime I click on Run, this message appears in the console:

> dotnet run
Couldn't find a project to run. Ensure a project exists in /home/runner/P1C22-SamGoyangi, or pass the path to the project using --project.
exit status 1

Expected behavior:

This:

using System;

public class MyVariable
{
    public static void Main(string[] args)
    {
        
        int allocationCourante = 200;
        int epargne = 3000;
        int prime = 500;
        
        Console.WriteLine("Votre allocation courante est de " + allocationCourante);
        Console.WriteLine("Le montant de votre épargne est de " + epargne);
        Console.WriteLine("Vous bénéficiez d'une prime de " + prime);
    }
}

is supposed to show text in the console but doesn’t work.

Actual behavior:

With every exercice I try, the same thing is shown in the console:

> dotnet run
Couldn't find a project to run. Ensure a project exists in /home/runner/P1C22-SamGoyangi, or pass the path to the project using --project.
exit status 1

I asked the AI Ghostwriter why it didn’t work and did everything it told me to do but kept not working everytime. This is the chat I had with Ghostwriter:

-SamGoyangi

Why doesn’t my code work?

-Ghostwriter

Your code is not working because you have a typo in the class name. In the file, the class is defined as MaVariable, but it should be MyVariable to match the file name.

To fix it, you should change the class definition to:

public class MyVariable
{
    // rest of the code...
}

After making this change, your code should work as expected.

-SamGoyangi

why it still doesn’t work?

-Ghostwriter

Apologies for the confusion. The issue with your code lies in the fact that you are initializing the prime variable with a comment instead of an actual value.

To fix it, you can modify the code on line 12 to initialize prime with the value 500 as follows:

int prime = 500;

After making this change, your code should work correctly and print the desired output.

-SamGoyangi

why it still doesn’t work?

-Ghostwriter

I apologize for the oversight. The issue with your code is that it contains non-ASCII characters in the comments, specifically the French characters in the comment lines.

To resolve this issue, you can either remove the non-ASCII characters or add the appropriate encoding declaration at the top of your file. Since you’re using C#, you can add the encoding declaration by including a #encoding directive at the top of your file. Here’s an example:

#encoding utf-8
using System;
public class MyVariable
{
    public static void Main(string[] args)
    {
        // déclarer une variable int nommée allocationCourante
        int allocationCourante = 200;
        // déclarer une variable int epargne
        int epargne = 3000;
        int prime = 500;
        // Afficher le résultat
        Console.WriteLine("Votre allocation courante est de " + allocationCourante);
        Console.WriteLine("Le montant de votre épargne est de " + epargne);
        Console.WriteLine("Vous bénéficiez d'une prime de " + prime);
    }
}

Adding the #encoding utf-8 directive at the top of your file should resolve the issue and allow your code to execute without any errors.

-SamGoyangi

why it still doesn’t work?

-Ghostwriter

I apologize for the confusion. Upon closer inspection, there seems to be an error in the comment syntax of your C# code. C# does not use // for single-line comments. Instead, it uses // for single-line comments and /* */ for multi-line comments.

To fix the issue, you can modify the comments in your code to use the correct syntax. Here’s the updated code:

#encoding utf-8
using System;
public class MyVariable
{
    public static void Main(string[] args)
    {
        // déclarer une variable int nommée allocationCourante
        int allocationCourante = 200;
        // déclarer une variable int epargne
        int epargne = 3000;
        int prime = 500;
        // Afficher le résultat
        Console.WriteLine("Votre allocation courante est de " + allocationCourante);
        Console.WriteLine("Le montant de votre épargne est de " + epargne);
        Console.WriteLine("Vous bénéficiez d'une prime de " + prime);
    }
}

With these changes, your code should work correctly and produce the desired output.

-SamGoyangi

why it still doesn’t work?

-Ghostwriter

I apologize for the confusion. It seems that the code you provided is written in C#, but we are currently in a Python conversation. I can assist you with Python code, but I am not able to execute or troubleshoot C# code.

If you have any Python-related questions or need assistance with Python code, feel free to ask, and I’ll be happy to help."

Steps to reproduce:

Type this:

using System;

public class MyVariable
{
    public static void Main(string[] args)
    {
        
        int allocationCourante = 200;
        int epargne = 3000;
        int prime = 500;
        
        Console.WriteLine("Votre allocation courante est de " + allocationCourante);
        Console.WriteLine("Le montant de votre épargne est de " + epargne);
        Console.WriteLine("Vous bénéficiez d'une prime de " + prime);
    }
}

in the console and see what happens.

Bug appears at this link:

https://replit.com/@OCApprenezaprogrammerenC/P1C22-SamGoyangi#MaVariable.cs

Browser/OS/Device:

Google Chrome on PC

That’s a 404 page if I’m not mistaken

1 Like

Hi, I have the exact same problem with the same C# course, did you find a solution since ?

Not yet, what the customer service asked me to do didn’t work and I’m still waiting for a solution

I have the same problem, apparently it’s still not fixed.

Alright, i found the problem, there should be a file named “main.csproj” that isn’t there. You need to create it. I suggest opening a C# template and copying the code in the file atuomatically generated there.

Also, the class should not be named “Main”, it clashes with the function which is also called “Main”. I suggest changing the class name to “Program”, as it’s the default name in the C# template and so it’s the class name the copied “main.csproj” file is going to look for.

More information about this “bug” :

In the second part of the lesson, adding a main.csproj file no longer works. That is because we are supposed to compile the given .cs file into a .exe file and then execute this file.

According to the instructions, hitting the green “run” button is supposed to compile and execute the files for us. However, it does not do that, the “run” button actually sends the wrong command to the terminal.

I think that this was also the issue in the previous exercises. Adding a main.csproj file as i said in my previous comment was just a way for the wrong command to work.

Anyway, the correct command to input is “csc [insert file name here].cs; mono [insert file name here].exe”. As the name of the file varies in function of the exercise, i haven’t put a specific name.

So for example, in exercise 2C21, you need to type “csc BonjourMonde.cs; mono BonjourMonde.exe” in the terminal and then hit enter, instead of hitting the green “run” button.

I forgot to mention, the “mono” command is not installed in the repl, so when launching the command i gave previously they ask us what to install. I chose to install “mono.out” every time the question was asked and it worked.

Hey @SamGoyangi!

It looks like your main file is not named “Main.cs”. Please rename the MyVariable file and class to “Main”, which should fix the issue.

@Zift-YlrhavicYl Could you show me where you found that information? The run button only runs the run command located in the .replit file and does not change based on the open file.

In the exercice P2C2.1 of the openclassroom C# teams (https://replit.com/@OCApprenezaprogrammerenC/P2C21-Zift-YlrhavicYl), there is a file named “Instructions” that opens automatically when arriving on the page. On the left, it is present among the “Tools” icons instead of being among the “Files” section.

These are the instructions of the exercise that the students are supposed to follow.

In this file, the first sentence is “Cliquez sur le bouton vert Run pour compiler et exécuter l’application.” which translates to “Click on the green button Run to compile and execute the application.” .

This means that the command in the .replit file was supposed to be something along the lines of “csc FileName.cs; mono FileName.exe”, but the person that set up this repl (as well as all the repls of this teams that i’ve seen so far) did not set it up correctly.

By the way, i discovered Replit when Openclassroom sent me here for these exercises so i apologize if my explanations are confusing, i’m not familiar with the terminology and structure of this site.

Thanks for the information, and no problem at all!

Please let me know if I can help with anything else!