Hesap Makinesi (Calculator )

Public Class Form1

    Dim sayi1, sayi2 As Double

    Dim sonuc As Double

    Dim isaret As String

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

        TextBox1.Text = TextBox1.Text & "1"

    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click

        TextBox1.Text = TextBox1.Text & "2"

    End Sub

    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click

        TextBox1.Text = TextBox1.Text & "3"

    End Sub

    Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click

        TextBox1.Text = TextBox1.Text & "4"

    End Sub

    Private Sub Button5_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button5.Click

        TextBox1.Text = TextBox1.Text & "5"

    End Sub

    Private Sub Button6_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button6.Click

        TextBox1.Text = TextBox1.Text & "6"

    End Sub

    Private Sub Button7_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button7.Click

        TextBox1.Text = TextBox1.Text & "7"

    End Sub

    Private Sub Button8_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button8.Click

        TextBox1.Text = TextBox1.Text & "8"

    End Sub

    Private Sub Button9_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button9.Click

        TextBox1.Text = TextBox1.Text & "9"

    End Sub

    Private Sub Button10_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button10.Click

        TextBox1.Text = TextBox1.Text & "0"

    End Sub

    Private Sub Button11_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button11.Click

        TextBox1.Text = TextBox1.Text & ","

    End Sub

    Private Sub Button12_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button12.Click

        sayi1 = TextBox1.Text

        isaret = "+"

        TextBox1.Text = ""

        Label1.Text = "+"

    End Sub

    Private Sub Button13_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button13.Click

        sayi1 = TextBox1.Text

        isaret = "-"

        TextBox1.Text = ""

        Label1.Text = "-"

    End Sub

    Private Sub Button14_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button14.Click

        sayi1 = TextBox1.Text

        isaret = "x"

        TextBox1.Text = ""

        Label1.Text = "x"

    End Sub

    Private Sub Button15_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button15.Click

        sayi1 = TextBox1.Text

        isaret = "/"

        TextBox1.Text = ""

        Label1.Text = "/"

    End Sub

    Private Sub Button16_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button16.Click

        sayi2 = TextBox1.Text

        Select Case isaret

            Case "+"

                sonuc = sayi1 + sayi2

            Case "-"

                sonuc = sayi1 - sayi2

            Case "x"

                sonuc = sayi1 * sayi2

            Case "/"

                If sayi2 = 0 Then

                    MsgBox("Sıfıra Bölünme Hatası", MsgBoxStyle.Exclamation, "Hesap Makinesi")

                Else

                    sonuc = sayi1 / sayi2

                End If

        End Select

        TextBox1.Text = sonuc

        Label1.Text = ""

    End Sub

    Private Sub Button17_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button17.Click

        TextBox1.Text = ""

        Label1.Text = ""

    End Sub

End Class