Program Diskon Beli

desain form seperti gambar di bawah ini..............

Ketentuan

mendeklarasikan (memperkenlakan) 

variabel mdis dengan tipe data double

kemudian menhitung jumlah beli, jika jumlah beli (TextBox3) 

di atas 20000 maka akan mendapatkan diskon 10% 

sebaliknya tidak mendapatkan, kemudian untuk

menghitung bayar dari jumlah beli di kurang diskon.

Coding Program

Public Class Form1

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

        Me.Close()

    End Sub

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

        TextBox1.Text = ""

        TextBox2.Text = ""

        TextBox3.Text = ""

        TextBox4.Text = ""

        TextBox5.Text = ""

        TextBox1.Focus()

    End Sub

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

        Dim mdis As Double

        TextBox3.Text = Val(TextBox1.Text) * Val(TextBox2.Text)

        If TextBox3.Text > 20000 Then

            mdis = TextBox3.Text * 0.01

        Else

            mdis = TextBox3.Text * 0

        End If

        TextBox4.Text = mdis

        TextBox5.Text = TextBox3.Text - TextBox4.Text

    End Sub

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

        TextBox3.Enabled = False

        TextBox4.Enabled = False

        TextBox5.Enabled = False

    End Sub

End Clas
s