Homework Help Forum: visual basic

Posted by cl on Friday, May 8, 2009 at 1:11pm.

here is my source code for my program im trying to convert 10 units from furlong to meters the answer is supposed to be 2011.68 meters i keep getting 2000. I know if i cant get this right the rest of the conversion will give the wrong answers anybody have any ideas? Dim inch As Long Dim fathom As Long Dim foot As Long Dim furlong As Long Dim kilometer As Long Dim meter As Long Dim rod As Long Dim miles As Long Dim yard As Long Dim Feet As Long Dim Original As Long Dim Desired As Long Dim A(0 To 9) As Long Dim B(0 To 9) As Long Dim result As Long Private Sub convertButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles convertButton.Click Feet = Val(ConvertText.Text) Original = Val(OUnitsTexT.Text) Desired = Val(DUnitsText.Text) inch = 0.0833 * Feet yard = 3 * Feet meter = 3.28155 * Feet fathom = 6 * Feet rod = 16.5 * Feet furlong = 660 * Feet kilometer = 3281.5 * Feet miles = 5280 * Feet A(1) = inch A(2) = fathom A(3) = foot A(4) = furlong A(5) = kilometer A(6) = meter A(7) = miles A(8) = rod A(9) = yard B(1) = inch B(2) = fathom B(3) = Feet B(4) = furlong B(5) = kilometer B(6) = meter B(7) = miles B(8) = rod B(9) = yard result = ((A(Original)) / ((B(Desired)) / Feet)) lengthText.Text = Val(result) lengthText.Text = FormatNumber(result, 2, , , TriState.True)

• visual basic - SraJMcGin, Friday, May 8, 2009 at 2:41pm

  I only know that taking this Conversion Chart, entering 6600 feet and changing to meters, I do get 2022.68. http://www.sciencemadesimple.com/length_conversion.php This is definitely not my area so I can not help you set up a formula, if that is what you need. Sra

  
  

• visual basic - RickP, Friday, May 8, 2009 at 7:04pm

  The problem MIGHT be here. result = ((A(Original)) / ((B(Desired)) / Feet)) Some languages (like C and C++) do integer division unless you explicitly make it do "normal" division. In other words, if you do 5/2 in C the result will be the integer 2, not the "floating point number" 2.5.

  
  

• visual basic - RickP, Friday, May 8, 2009 at 7:08pm

  I just figured it out: It's simpler than that. You are declaring all of your numeric variables a LONG. LONG is an integer data type: it does not store anything to the right of a decimal point. Try using DOUBLE (or better, DECIMAL, if your version supports it) for any numbers you need to have values to the right of the decimal point.

  
  

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