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rjavaid

Sat Feb 06, 2010 11:19 pm


Problem: Value is too large!

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Hi guys,

seemed easy enough when I first started to program it. It's been a little more than an hour now, trying to figure out how to correct these few lines of code. The problem is that the Energy being calculated ---> Energy = Mass * (C ^ 2) ---> is coming out to a very high value, and apparently VB doesn't like that. Here's my code, and help would be greatly appreciated!

By the way, I'm using VB Express
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Public Class Form1

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

    End Sub

    
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim Mass As Integer
        Dim Energy As Integer
        Dim Bulbs As Integer
        Dim C As Double                  'C is the speed of light


        C = 300000000.0 ^ 2


        Mass = TextBox1.Text           ' User inputs a Mass in kg


        Energy = Mass * (C ^ 2)       ' Calculates the amount of Energy in Joules 

        TextBox2.Text = Energy            


        Bulbs = Energy / 360000       ' Calculates the number of 100W light bulbs that can be powered

        TextBox3.Text = Bulbs

    End Sub
End Class


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chrisbrown

Sun Feb 07, 2010 12:09 am


RE:Problem: Value is too large!

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First, you are squaring C twice.

That won't fix your error though. The value of C^2 is more than an integer can handle, so a variable that is assigned to some multiple of C^2 needs to be able to handle numbers beyond the integer range.


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Insectoid

Sun Feb 07, 2010 12:44 am


RE:Problem: Value is too large!

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I don't know if VB has a 'Long' data type, but that's what Java uses for huge numbers. You could also do clever math to shrink the numbers (divide C by 10000 or more) and then multiply the final answer by 10000. Or whatever would make the answer correct.


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syntax_error

Sun Feb 07, 2010 2:04 am


RE:Problem: Value is too large!

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VB does support long and double if needed


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faethor

Sun Feb 07, 2010 10:24 am


Re: Problem: Value is too large!

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Here, you are doing a calculation with Joules. To produce a smaller number, calculate it in Electron Volts. The conversion factor is 1J = 1.602?10^-19. The reason why you do c^2 is to make it a relativistic unit.


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william 01

Thu Jan 06, 2011 9:39 pm


Re: Problem: Value is too large!

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what vb are you using? :?:


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Insectoid

Thu Jan 06, 2011 9:54 pm


RE:Problem: Value is too large!

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This thread is nearly a year old. OP hasn't posted more than once. Go away.