System overflow with simple arithmetic?

Question

For some weird reason I get a system overflow with this:

Public Class Form1
    Dim x As Integer = 2
    Dim value As Integer = 0
    Private Sub c()
a:
        If 1 + 1 = x Then
            value = value + 4
        End If
        GoTo a
    End Sub
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        c()
        Timer1.Enabled = True
    End Sub

    Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
        Label2.Text = value
    End Sub
End Class


PS. im back./fmm

'Bruno · Answer

man wtf... are you dumb? (sry for flame)

you have it on a infinite loop...

Go to A -> Do the if -> Go to A -> Do the if... over and over

Oh.. and GoTo's is a bad a practice of programming.

Blubb1337 · Answer

And wtf is that anyways? o_O

Nonsense 2 me.

Brinuz 4 president.

mizzer3 · Answer

tell me what this is!!!:D

master131 · Answer

That looks like Batch and DOS.... Anyway, what is the purpose of this code?

Save this as a .bat file and this explains basically what you are trying to do:

@echo off
set /a x=2
set /a value=0
set /a add=1+1

goto a

:a
if %x% == %add% (
 set /a value += 4
 echo %value%
 goto a
)
pause

Even though I have a pause there which basically pauses the .bat file, it ignores it and loops :a infinately...

mnpeepno2 · Answer

purpose is to find the calculations per second of a processor at 50% load (50% because of vb limitations) so this is what I came up with, but strangely, with this code it does not crash...

label3.text = label3.text + 4
label3.refresh()

(and i know its an infinite loop)

'Bruno · Answer

[quote=mnpeepno2;3010933]purpose is to find the calculations per second of a processor at 50% load (50% because of vb limitations) so this is what I came up with, but strangely, with this code it does not crash...

label3.text = label3.text + 4
label3.refresh()


(and i know its an infinite loop)[/quote]

if you want a program to get into an infinite loop, why using a GoTo? and not a While(true)? just wondering.. And of course it won't crash because while it refresh's, it also sends the information to the GUI, which lets you see the info of those calculations.

On a while loop or Goto loop, it will freeze the GUI because it won't send any info to the GUI, any paint, anything. Which will lead into a crash.

PS: You know that there is more code running beside the one you usually see right?

mnpeepno2 · Answer

[quote=Brinuz;3011311]if you want a program to get into an infinite loop, why using a GoTo? and not a While(true)? just wondering.. And of course it won't crash because while it refresh's, it also sends the information to the GUI, which lets you see the info of those calculations.

On a while loop or Goto loop, it will freeze the GUI because it won't send any info to the GUI, any paint, anything. Which will lead into a crash.

PS: You know that there is more code running beside the one you usually see right?[/quote]

i thought goto might fix the problem.

PS: Yes, but the Gui is being controlled by the graphics card processor.

'Bruno · Answer

[quote=mnpeepno2;3011612]i thought goto might fix the problem.

PS: Yes, but the Gui is being controlled by the graphics card processor.[/quote]

thats not the issue, you are freezing the code in that place. the code to refresh the gui, to the GUI paint won't get reached...

mnpeepno2 · Answer

k got it.
/short

Jason · Answer

Use a backgroundworker for your infinite loop, or a seperate thread so it won't hang the UI thread.

System overflow with simple arithmetic?

Similar Threads

Tags for this Thread