[RESOLVED] (newbie question) "Use compound assignment" in a simple program

[paul.e.king]

Hi. There are some problems I am having regarding an error I am getting regarding something called a "compound assignment". Here is the code. I can't see for the life of me where anything may be the matter. For the record, this code is intended to be run in Windows, and is not a console app.

The program just takes a number from a text box, and uses it to
write a list of numbers in another text box. I can program in other languages, but am a newbie to Visual Basic.

Public Class Form1
    Private Sub BtnCalc_Click(sender As Object, e As EventArgs)
        Dim n As Int64 = Int64.Parse(TextBox1.Text)
        RichTextBox1.Clear()

        While (n <> 1)
            If (n Mod 2 = 1) Then
                ' it is odd
                n = n * 3 + 1
            Else
                ' it is even
                n = n / 2
            End If
            RichTextBox1.AppendText(Str(n))
        End While
    End Sub
End Class

The error message says the error occurs on Line 12, where there is the statement n = n/2. This seems to be a fatal error, as the program neither compiles nor runs. Any ideas?

Paul King

[David Anton]

It both compiles and runs for me.

The issue about compound assignment is just a suggestion by Visual Studio - you can rewrite that statement as "n /= 2", but your version is still correct.

[paul.e.king]

It both compiles and runs for me.

The issue about compound assignment is just a suggestion by Visual Studio - you can rewrite that statement as "n /= 2", but your version is still correct.

I just compiled it again, and I am getting a different error:

error BC30420: 'Sub Main' was not found in 'Collatz'

I didn't change anything. When I set up the project, I didn't like saving the project to C: drive, so I chose a location on another drive. There was also a pop-up I got which said that the exe file that was "in my debug profile" doesn't exist -- which was a strange error. Where is this debug profile, and how can I change it?

Paul

[paul.e.king]

I just compiled it again, and I am getting a different error:

error BC30420: 'Sub Main' was not found in 'Collatz'

I didn't change anything. When I set up the project, I didn't like saving the project to C: drive, so I chose a location on another drive. There was also a pop-up I got which said that the exe file that was "in my debug profile" doesn't exist -- which was a strange error. Where is this debug profile, and how can I change it?

Paul

It looks like VB made sub Main() my startup object in the debug configuration. I changed it to "Form1". This was under the "Debug|ProgName debug Properties" menu item. A tab of debug properties comes up,and you need to choose the "Application" tab, and change the setting for Startup Object near the bottom of that form.

[.paul.]

VB wouldn't normally just change that for no reason...