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- Public Class Form1
- Private Sub TextBox1_TextChanged(sender As Object, e As EventArgs) Handles txtbox1.TextChanged
- End Sub
- Private Sub btn1_Click(sender As Object, e As EventArgs) Handles btn1.Click
- txtbox1.Text = txtbox1.Text + "1"
- End Sub
- Private Sub btn2_Click(sender As Object, e As EventArgs) Handles btn2.Click
- txtbox1.Text = txtbox1.Text + "2"
- End Sub
- Private Sub btn3_Click(sender As Object, e As EventArgs) Handles btn3.Click
- txtbox1.Text = txtbox1.Text + "3"
- End Sub
- Private Sub btn4_Click(sender As Object, e As EventArgs) Handles btn4.Click
- txtbox1.Text = txtbox1.Text + "4"
- End Sub
- Private Sub btn5_Click(sender As Object, e As EventArgs) Handles btn5.Click
- txtbox1.Text = txtbox1.Text + "5"
- End Sub
- Private Sub btn6_Click(sender As Object, e As EventArgs) Handles btn6.Click
- txtbox1.Text = txtbox1.Text + "6"
- End Sub
- Private Sub btn7_Click(sender As Object, e As EventArgs) Handles btn7.Click
- txtbox1.Text = txtbox1.Text + "7"
- End Sub
- Private Sub btn8_Click(sender As Object, e As EventArgs) Handles btn8.Click
- txtbox1.Text = txtbox1.Text + "8"
- End Sub
- Private Sub btn9_Click(sender As Object, e As EventArgs) Handles btn9.Click
- txtbox1.Text = txtbox1.Text + "9"
- End Sub
- Private Sub btn0_Click(sender As Object, e As EventArgs) Handles btn0.Click
- txtbox1.Text = txtbox1.Text + "0"
- End Sub
- Dim num1, num2 As Integer
- Dim oper As String
- Private Sub btnadd_Click(sender As Object, e As EventArgs) Handles btnadd.Click
- num1 = txtbox1.Text
- oper = "+"
- txtbox1.Clear()
- End Sub
- Private Sub btnsub_Click(sender As Object, e As EventArgs) Handles btnsub.Click
- num1 = txtbox1.Text
- oper = "-"
- txtbox1.Clear()
- End Sub
- Private Sub btneq_Click(sender As Object, e As EventArgs) Handles btneq.Click
- num2 = txtbox1.Text
- txtbox1.Clear()
- If oper = "+" Then
- txtbox1.Text = num1 + num2
- ElseIf oper = "-" Then
- txtbox1.Text = num1 - num2
- End If
- End Sub
- End Class
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