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:
Gambar Hasil Aplikasi Konversi Bilangan dengan program VB
6. Terbukti bukan,,,Selamat mencoba teman!!!
Adapun Contoh-contoh Program yang lain Menggunakan Visual Basic, yaitu :
MEMBUAT PROGRAM PORT PARALEL LED BERJALAN DENGAN VB
