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05.10.2008 at 11:57PM PDT, ID: 23392419
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9.6

VB 2005

Asked by PatriciaMDO in Visual Basic Programming

Hi I'm doing a scientific calculator but some buttons aren't working. Sqrt,sin,cos,log,sin-1. I don't know why. And also the code is kind of long. I was wondering if somebody knows how to make it shorter or simpler. If someone could help out that would be great. Thank you  Start Free Trial 
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Public Class Form1
    Function find(ByVal txtval As String, ByVal car As Char) As Boolean
        Dim b As Integer
        For b = 1 To txtval.Length
            If Convert.ToChar(Mid(txtval, b, 1)) = car Then
                Return False
            End If
        Next
        Return True
    End Function
    
    Dim val1, val2 As Double
 
    Dim operation As String
    Private Sub Btn0_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Btn0.Click
 
        txtre.Text &= "0"
        
    End Sub
 
    Private Sub Btn1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn1.Click
 
        txtre.Text &= "1"
       
    End Sub
 
    Private Sub Btn2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn2.Click
 
        txtre.Text &= "2"
       
    End Sub
 
    Private Sub Btn3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn3.Click
 
        txtre.Text &= "3"
        
    End Sub
 
    Private Sub Btn4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn4.Click
 
        txtre.Text &= "4"
       
    End Sub
 
    Private Sub Btn5_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn5.Click
 
        txtre.Text &= "5"
        
    End Sub
 
    Private Sub Btn6_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn6.Click
 
        txtre.Text &= "6"
       
    End Sub
 
    Private Sub Btn7_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn7.Click
 
        txtre.Text &= "7"
       
    End Sub
 
    Private Sub Btn8_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn8.Click
 
        txtre.Text &= "8"
       
    End Sub
 
    Private Sub Btn9_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn9.Click
 
        txtre.Text &= "9"
       
    End Sub
 
    Private Sub Btnce_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Btnce.Click
        operation = ""
        val2 = 0
        txtre.Text = ""
       
        txtre.Focus()
    End Sub
 
    Private Sub Btnc_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnc.Click
       
        operation = ""
        val1 = 0
        val2 = 0
        txtre.Text = ""
        txtre.Focus()
    End Sub
 
    Private Sub Btnequal_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnequal.Click
        val2 = Val(txtre.Text)
        Select Case operation
            Case "+"
                val1 += val2
            Case "-"
                val1 -= val2
            Case "*"
                val1 *= val2
            Case "/"
                val1 /= val2
            Case "^"
                val1 ^= val2
           
        End Select
        txtre.Text = val1
       
    End Sub
 
 
    Private Sub Btnadd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnadd.Click
 
      
        If val1 = Val(txtre.Text) Then
            operation = "+"
            txtre.Text = ""
            txtre.Focus()
        Else
            val2 = Val(txtre.Text)
            Select Case operation
                Case "+", "-", "*", "/", "^"
            End Select
        End If
        operation = "+"
        txtre.Text = val1
 
    End Sub
 
    Private Sub Btnsub_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnsub.Click
 
        If val2 = Val(txtre.Text) Then
            operation = "-"
            txtre.Focus()
        Else
            Select Case operation
                Case "+", "-", "*", "/", "^"
            End Select
        End If
        operation = "-"
        txtre.Text = val1
 
    End Sub
 
    Private Sub Btnmul_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Btnmul.Click
 
        If val1 = Val(txtre.Text) Then
            operation = "*"
 
            txtre.Focus()
        Else
            val2 = Val(txtre.Text)
 
            Select Case operation
                Case "+", "-", "*", "/", "^"
            End Select
        End If
        operation = "*"
        txtre.Text = val1
 
 
    End Sub
 
    Private Sub Btndiv_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btndiv.Click
 
        If val1 = Val(txtre.Text) Then
            operation = "/"
            txtre.Text = ""
            txtre.Focus()
 
        Else
            val2 = Val(txtre.Text)
            
            Select Case operation
                Case "+", "-", "*", "/", "^"
            End Select
        End If
            operation = "/"
            txtre.Text = val1
           
    End Sub
 
    
 
    Private Sub Btnex_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Btnex.Click
 
        If val1 = Val(txtre.Text) Then
            operation = "^"
            txtre.Text = ""
            txtre.Focus()
 
        Else
            val2 = Val(txtre.Text)
            Select Case operation
                Case "+", "-", "*", "/", "^"
            End Select
        End If
            operation = "^"
            txtre.Text = val1
            
    End Sub
    
    Private Sub btnroot_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnroot.Click
 
 
        If val1 = Val(txtre.Text) Then
            operation = Math.Sqrt(val1)
            txtre.Focus()
 
        Else
            val2 = Val(txtre.Text)
            Select Case operation
                Case "+", "-", "*", "/", "^"
            End Select
        End If
        operation = Math.Sqrt(val1)
            txtre.Text = val1
            
    End Sub
 
    Private Sub Btndot_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Btndot.Click
        If find(txtre.Text, ".") = True Then
            txtre.Text &= "."
        End If
    End Sub
 
    Private Sub btnexit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnexit.Click
        Me.Close()
    End Sub
 
    Private Sub Btnsin_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Btnsin.Click
        If val1 = Val(txtre.Text) Then
            operation = Math.Sin(val1)
        Else : val2 = Val(txtre.Text)
            Select Case operation
                Case "+", "-", "*", "/", "^"
            End Select
        End If
        operation = Math.Sin(val1)
        txtre.Text = val1
    End Sub
 
    Private Sub Btncos_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Btncos.Click
 
        If val1 = Val(txtre.Text) Then
            operation = Math.Cos(val1)
        Else : val2 = Val(txtre.Text)
            Select Case operation
                Case "+", "-", "*", "/", "^"
            End Select
        End If
        operation = Math.Cos(val1)
        txtre.Text = val1
    End Sub
 
    Private Sub Btntan_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Btntan.Click
        If val1 = Val(txtre.Text) Then
            operation = Math.Tan(val1)
        Else : val2 = Val(txtre.Text)
            Select Case operation
                Case "+", "-", "*", "/", "^"
            End Select
        End If
        operation = Math.Tan(val1)
        txtre.Text = val1
    End Sub
 
    Private Sub Btnlog_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Btnlog.Click
        If val1 = Val(txtre.Text) Then
            operation = Math.Log(val1)
        Else : val2 = Val(txtre.Text)
            Select Case operation
                Case "+", "-", "*", "/", "^"
            End Select
        End If
        operation = Math.Log(val1)
        txtre.Text = val1
    End Sub
 
    
    Private Sub btnsin1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnsin1.Click
        If val1 = Val(txtre.Text) Then
            operation = Math.Asin(val1)
        Else : val2 = Val(txtre.Text)
            Select Case operation
                Case "+", "-", "*", "/", "^"
            End Select
        End If
        operation = Math.Asin(val1)
        txtre.Text = val1
    End Sub
End Class
[+][-]05.11.2008 at 02:14AM PDT, ID: 21541918

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About this solution

Zone: Visual Basic Programming
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Solution Provided By: demi-os
Participating Experts: 2
Solution Grade: A
 
 
[+][-]05.11.2008 at 04:34AM PDT, ID: 21542137

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[+][-]05.11.2008 at 03:17PM PDT, ID: 21543712

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[+][-]05.11.2008 at 03:34PM PDT, ID: 21543768

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[+][-]05.11.2008 at 10:41PM PDT, ID: 21544836

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