MEMBUAT APLIKASI KONVERSI BILANGAN DENGAN PROGRAM VB

Konversi bilangan adalah perubahan bilangan yang biasanya kita kenal seperti bilangan biner, hexadesimal, desimal dan oktal. Dimana sistem bilangan ini wajib kita pahami untuk seorang mahasiswa Teknik Elektro apalagi ingin menjadi seorang Programmer.

1. Desimal

Bilangan desimal adalah bilangan yang mempunyai sepuluh simbol angka yaitu 0,1,2,3,4,5,6,7,8,9.

2. Heksadesimal

Bilangan heksadesimal adalah bilangan yang mempunyai enam belas simbol angka yaitu 0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F.

3. Biner

Bilangan Biner adalah bilangan yang mempunyai dua simbol 0 dan 1

4. Oktal

Bilangan heksadesimal adalah bilangan yang mempunyai delapan simbol angka yaitu 0,1,2,3,4,5,6,7

Berikut tabel konversi bilangan :

Desimal	Biner	Oktal	Hexadesimal
0	0	0	0
1	1	1	1
2	10	2	2
3	11	3	3
4	100	4	4
5	101	5	5
6	110	6	6
7	111	7	7
8	1000	10	8
9	1001	11	9
10	1010	12	A
11	1011	13	B
12	1100	14	C
13	1101	15	D
14	1110	16	E
15	1111	17	F

Baiklah kita akan membuat program Aplikasi Konversi Bilangan dengan VB dimana aplikasi ini akan membantu anda mengkonversikan bilangan secara cepat dan tepat :

1. Seperti biasa buatlah New Project pada software VB anda kemudian tambahkan 11 label, 2 textbox, 2 frame, 8 optionbutton, dan 3 commandbutton.

2. Desainlah menjadi seperti gambar dibawah ini :

Gambar Form Aplikasi Konversi Bilangan dengan program VB

3. Kemudian ketikkan kode/script/listing program dibawah ini :

Option Explicit

Private Sub command2_Click()

Text1.Text = ""

Text2.Text = ""

End Sub

Private Sub command3_Click()

End

End Sub

Private Sub command1_Click()

If Option2.Value And Option5.Value Then Text2.Text = BinToDes(Text1.Text)

If Option2.Value And Option6.Value Then Text2.Text = Text1.Text

If Option2.Value And Option7.Value Then Text2.Text = BinToOk(Text1.Text)

If Option2.Value And Option8.Value Then Text2.Text = BinToHex(Text1.Text)

If Option1.Value And Option6.Value Then Text2.Text = DesToBin(Text1.Text)

If Option1.Value And Option5.Value Then Text2.Text = Text1.Text

If Option1.Value And Option7.Value Then Text2.Text = DesToOk(Text1.Text)

If Option1.Value And Option8.Value Then Text2.Text = DesToHex(Text1.Text)

If Option3.Value And Option6.Value Then Text2.Text = OkToBin(Text1.Text)

If Option3.Value And Option8.Value Then Text2.Text = OkToHex(Text1.Text)

If Option3.Value And Option5.Value Then Text2.Text = OkToDes(Text1.Text)

If Option3.Value And Option7.Value Then Text2.Text = Text1.Text

If Option4.Value And Option6.Value Then Text2.Text = HexToBin(Text1.Text)

If Option4.Value And Option5.Value Then Text2.Text = HexToDes(Text1.Text)

If Option4.Value And Option7.Value Then Text2.Text = HexToOk(Text1.Text)

If Option4.Value And Option8.Value Then Text2.Text = Text1.Text

With Text1

.SelStart = 0

.SelLength = Len(Text1.Text)

End With

End Sub

Public Function BinToDes(ByVal NBiner As String) As Long

Dim A As Integer

Dim B As Long

Dim Nilai As Long

On Error GoTo ErrorHandler

B = 1

For A = Len(NBiner) To 1 Step -1

If Mid(NBiner, A, 1) = "1" Then Nilai = Nilai + B

B = B * 2

Next

BinToDes = Nilai

Exit Function

ErrorHandler:

BinToDes = 0

End Function

Public Function DesToBin(ByVal NDesimal As Long) As String

Dim C As Byte

Dim D As Long

Dim Nilai As String

On Error GoTo ErrorHandler

D = (2 ^ 31) - 1

While D > 0

If NDesimal - D >= 0 Then

NDesimal = NDesimal - D

Nilai = Nilai & "1"

Else

If Val(Nilai) > 0 Then Nilai = Nilai & "0"

End If

D = D / 2

Wend

DesToBin = Nilai

Exit Function

ErrorHandler:

DesToBin = 0

End Function

Public Function DesToHex(ByVal NDesimal As Long) As String

DesToHex = Hex(NDesimal)

End Function

Public Function HexToDes(ByVal NHexa As String) As Long

Dim E As Integer

Dim Nilai As Long

Dim F As Long

Dim CharNilai As Byte

On Error GoTo ErrorHandler

For E = Len(NHexa) To 1 Step -1

Select Case Mid(NHexa, E, 1)

Case "0" To "9": CharNilai = CInt(Mid(NHexa, E, 1))

Case Else: CharNilai = Asc(Mid(NHexa, E, 1)) - 55

End Select

Nilai = Nilai + ((16 ^ F) * CharNilai)

F = F + 1

Next E

HexToDes = Nilai

Exit Function

ErrorHandler:

HexToDes = 0

End Function

Public Function DesToOk(ByVal NDesimal As Long) As String

DesToOk = Oct(NDesimal)

End Function

Public Function OkToDes(ByVal NOktal As String) As Long

Dim G As Integer

Dim H As Long

Dim Nilai As Long

On Error GoTo ErrorHandler

For G = Len(NOktal) To 1 Step -1

Nilai = Nilai + (8 ^ H) * CInt(Mid(NOktal, G, 1))

H = H + 1

Next G

OkToDes = Nilai

Exit Function

ErrorHandler:

OkToDes = 0

End Function

Public Function BinToOk(ByVal bin As Long) As String

BinToOk = DesToOk(BinToDes(bin))

End Function

Public Function BinToHex(ByVal NBiner As Long) As String

BinToHex = DesToHex(BinToDes(NBiner))

End Function

Public Function OkToBin(ByVal NOktal As Double) As String

OkToBin = DesToBin(OkToDes(NOktal))

End Function

Public Function OkToHex(ByVal NOktal As Double) As String

OkToHex = DesToHex(OkToDes(NOktal))

End Function

Public Function HexToBin(ByVal NHexa As String) As String

HexToBin = DesToBin(HexToDes(NHexa))

End Function

Public Function HexToOk(ByVal NHexa As String) As Double

HexToOk = DesToOk(HexToDes(NHexa))

End Function

Private Sub Form_Load()

Move (Screen.Width - Me.Width) / 2, (Screen.Height - Me.Height) / 2

Text1.Text = ""

Text2.Text = ""

End Sub

4. Simpan dan Jalankan Program anda dengan menekan tombol F5, kemudian coba masukkan nilai 15 (terserah anda), kemudian pilih Desimal untuk masukan dan Biner untuk keluaran

5. Hasilnya seperti berikut: