kalkulator

Option Explicit On

Public Class Form1
    Dim firstnumber As Single
    Dim secondnumber As Single
    Dim answernumber As Single
    Dim aritmathmeticprocess As String
    Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click
        firstnumber = Val(TextBox1.Text)
        TextBox1.Text = ""
        aritmathmeticprocess = "+"
    End Sub

    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 Button5_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button5.Click
        TextBox1.Text = TextBox1.Text & 4
    End Sub

    Private Sub Button6_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button6.Click
        TextBox1.Text = TextBox1.Text & 5
    End Sub

    Private Sub Button7_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button7.Click
        TextBox1.Text = TextBox1.Text & 6
    End Sub

    Private Sub Button9_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button9.Click
        TextBox1.Text = TextBox1.Text & 7
    End Sub

    Private Sub Button10_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button10.Click
        TextBox1.Text = TextBox1.Text & 8
    End Sub

    Private Sub Button11_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button11.Click
        TextBox1.Text = TextBox1.Text & 9
    End Sub

    Private Sub Button14_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button14.Click
        TextBox1.Text = TextBox1.Text & 0
    End Sub

    Private Sub Button13_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button13.Click
        TextBox1.Text = TextBox1.Text & "."
    End Sub

    Private Sub Button15_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button15.Click
        secondnumber = Val(TextBox1.Text)
        If aritmathmeticprocess = "+" Then
            answernumber = firstnumber + secondnumber
        End If
        If aritmathmeticprocess = "-" Then
            answernumber = firstnumber - secondnumber
        End If
        If aritmathmeticprocess = "x" Then
            answernumber = firstnumber * secondnumber
        End If
        If aritmathmeticprocess = "%" Then
            answernumber = firstnumber / secondnumber
        End If
        TextBox1.Text = answernumber
    End Sub

    Private Sub Button17_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button17.Click
        TextBox1.Text = ""
    End Sub



    Private Sub Button8_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button8.Click
        firstnumber = Val(TextBox1.Text)
        TextBox1.Text = ""
        aritmathmeticprocess = "-"
    End Sub

    Private Sub Button12_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button12.Click
        firstnumber = Val(TextBox1.Text)
        TextBox1.Text = ""
        aritmathmeticprocess = "%"
    End Sub

    Private Sub Button16_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button16.Click
        firstnumber = Val(TextBox1.Text)
        TextBox1.Text = ""
        aritmathmeticprocess = "x"
    End Sub

End Class