vb.net code for addition of two number by using class function....

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hi....
~~plz~~ Please help me out to solve this problem I am nt getting exact code to get output as addition of two numbers by using class function....
this is my code for form......

VB

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
       a.Real = Val(TextBox1.Text)
       a.Imaginary = Val(TextBox2.Text)

       b.Real = Val(TextBox3.Text)
       b.Imaginary = Val(TextBox4.Text)
       c.addition(a, b)
       TextBox5.Text = c.ToString
   End Sub

And this s my code for class function............

VB

Public Function addition(ByVal c1 As complexnumber, ByVal c2 As complexnumber) As complexnumber
    Dim result As New complexnumber(c1.Real + c2.Real, c1.Imaginary + c2.Imaginary)
    Return result
End Function>

~~plz~~ Please help me where i am getting wrong...

Posted 19-Jun-12 0:33am

arizan

Updated 19-Jun-12 0:56am

Prasad_Kulkarni

v2

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Geo Jackson · Answer 1 · 2012-06-19T01:16:00

Try this

VB

Public Class Form1

    Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
        Dim a, b, c As New COmplexNumber
        a.realNum = 1
        a.imaginary = 2
        b.realNum = 2
        b.imaginary = 3

        c = c.Addition(a, b)

        TextBox1.Text = c.realNum & "+i" & c.imaginary
    End Sub
End Class
Public Class COmplexNumber
    Public realNum As Integer
    Public imaginary As Integer
    Public Function Addition(num1 As COmplexNumber, num2 As COmplexNumber) As COmplexNumber
        Dim result As New COmplexNumber
        result.realNum = (num1.realNum + num2.realNum)
        result.imaginary = (num1.imaginary + num2.imaginary)
        Addition = result
    End Function
End Class

Prosan · Answer 2 · 2012-06-19T01:04:00

Solution 1

write like this i hope it will work

VB

TextBox5.Text =c.addition(a, b).ToString

in function also make change

VB

Public Function addition(ByVal c1 As complexnumber, ByVal c2 As complexnumber) As complexnumber
    Dim result As New complexnumber(c1.Real + c2.Real, c1.Imaginary + c2.Imaginary)
    addition= result
End Function

Posted 19-Jun-12 1:04am

Prosan

Updated 19-Jun-12 1:12am

v2

Comments

arizan 19-Jun-12 7:08am

thanx but i am getting an error as "Object reference not set to an instance of an object."

Prosan 19-Jun-12 7:14am

now your problem will be solved. try it. it will sure work.

arizan 19-Jun-12 7:15am

thanx but same error again.....

Geo Jackson · Answer 3 · 2012-06-19T01:08:00

Solution 2

You nee to assign the result to some complex number.

Try C=C.addition(a,b)

TextBox5.Text=c.ToString might not give actual result .
Try Converting to String Format.

Posted 19-Jun-12 1:08am

Geo Jackson

Updated 19-Jun-12 1:11am

v2

Comments

arizan 19-Jun-12 7:14am

thanx..
& i have done it... but getting the same error as "Object reference not set to an instance of an object."