Simple
calculator made in the visual basic for beginners:
Everybody who knows the programming is wanted to create the
calculator. This simple source code will create the simple calculator for the
windows in the vb.net programming.
Create the new
windows form application and use the below coding:
Public Class Form1
Dim a As Double
Dim s As String
Public Sub calculate()
Select Case s
Case
"plus"
a = a + TextBox1.Text
TextBox1.Text = Str(a)
Case
"sub"
a = a - TextBox1.Text
TextBox1.Text = Str(a)
Case
"mul"
a = a * TextBox1.Text
TextBox1.Text = Str(a)
Case
"div"
a = a / TextBox1.Text
TextBox1.Text = Str(a)
End Select
End Sub
Private Sub TextBox1_TextChanged(ByVal
sender As System.Object, ByVal e As
System.EventArgs) Handles TextBox1.TextChanged
End Sub
Private Sub Button15_Click(ByVal
sender As System.Object, ByVal e As
System.EventArgs) Handles Button15.Click
TextBox1.Text &= Button15.Text
End Sub
Private Sub Form1_Load(ByVal
sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Load
End Sub
Private Sub Button5_Click(ByVal
sender As System.Object, ByVal e As
System.EventArgs) Handles Button5.Click
TextBox1.Text &= Button5.Text
End Sub
Private Sub Button6_Click(ByVal
sender As System.Object, ByVal e As
System.EventArgs) Handles Button6.Click
TextBox1.Text &= Button6.Text
End Sub
Private Sub Button7_Click(ByVal
sender As System.Object, ByVal e As
System.EventArgs) Handles Button7.Click
TextBox1.Text &= Button7.Text
End Sub
Private Sub Button8_Click(ByVal
sender As System.Object, ByVal e As
System.EventArgs) Handles Button8.Click
TextBox1.Text &= Button8.Text
End Sub
Private Sub Button9_Click(ByVal
sender As System.Object, ByVal e As
System.EventArgs) Handles Button9.Click
TextBox1.Text &= Button9.Text
End Sub
Private Sub Button10_Click(ByVal
sender As System.Object, ByVal e As
System.EventArgs) Handles Button10.Click
TextBox1.Text &= Button10.Text
End Sub
Private Sub Button11_Click(ByVal
sender As System.Object, ByVal e As
System.EventArgs) Handles Button11.Click
TextBox1.Text &= Button11.Text
End Sub
Private Sub Button12_Click(ByVal
sender As System.Object, ByVal e As
System.EventArgs) Handles Button12.Click
TextBox1.Text &= Button12.Text
End Sub
Private Sub Button13_Click(ByVal
sender As System.Object, ByVal e As
System.EventArgs) Handles Button13.Click
TextBox1.Text &= Button13.Text
End Sub
Private Sub Button1_Click(ByVal
sender As System.Object, ByVal e As
System.EventArgs) Handles Button1.Click
If (a
> 0) Or (a < 0) Then
calculate()
Else
a = TextBox1.Text
End If
s = "plus"
TextBox1.Text = ""
End Sub
Private Sub Button2_Click(ByVal
sender As System.Object, ByVal e As
System.EventArgs) Handles Button2.Click
If (a
> 0) Or (a < 0) Then
calculate()
Else
a = TextBox1.Text
End If
s = "sub"
TextBox1.Text = ""
End Sub
Private Sub Button3_Click(ByVal
sender As System.Object, ByVal e As
System.EventArgs) Handles Button3.Click
If (a
> 0) Or (a < 0) Then
calculate()
Else
a = TextBox1.Text
End If
s = "mul"
TextBox1.Text = ""
End Sub
Private Sub Button4_Click(ByVal
sender As System.Object, ByVal e As
System.EventArgs) Handles Button4.Click
If (a
> 0) Or (a < 0) Then
calculate()
Else
a = TextBox1.Text
End If
s = "div"
TextBox1.Text = ""
End Sub
Private Sub Button14_Click(ByVal
sender As System.Object, ByVal e As
System.EventArgs) Handles Button14.Click
calculate()
a = 0
s = ""
End Sub
Private Sub Button16_Click(ByVal
sender As System.Object, ByVal e As
System.EventArgs) Handles Button16.Click
a = 0
s = ""
TextBox1.Text = ""
End Sub
Private Sub Button17_Click(ByVal
sender As System.Object, ByVal e As
System.EventArgs) Handles Button17.Click
TextBox1.Text &= Button17.Text
End Sub
End Class
Explanation:
The above coding is using the very simple logic to
calculate. That is every time you enter the values it will verify the s value and change the calculate() to calculate the values
in the textbox.
So enjoy creating windows like calculator.
