Program penghitungan sederhana dengan C#

Berikut tutorial membuat perhitungan sederhana dengan C# oleh teman kita http://octtenz.wordpress.com

Kemudian pada bagian MainForm.cs ketikkan kode berikut ( atau copy paste sajalah ):

001

/*

002	* Created by SharpDevelop 2.2.1.

003	* User: S.P Widianto

004	* Date: 3/4/2010

005	* Time: 5:56 PM

006	* For : Octtenz.wordpress.com

007

*

008	* To change this template use Tools | Options | Coding | Edit Standard Headers.

009

*/

010

011	using System;

012	using System.Collections.Generic;

013	using System.Drawing;

014	using System.Data;

015	using System.Windows.Forms;

016

017	namespace saving

018

{

019	/// <summary>

020	/// Description of MainForm.

021	/// </summary>

022	public partial class MainForm : Form

023

{

024	// Bunga dapat ditambahkan secara harian atau bulanan

025	enum Compound {

026

Daily,

027

Monthly,

028	Quarterly,

029	SemiAnnually,

030

Annually

031

}

032

033	public MainForm()

034

{

035

//

036	// The InitializeComponent() call is required for Windows Forms designer support.

037

//

038	InitializeComponent();

039

040	cmbCompFreq.Items.Add(Compound.Daily);

041	cmbCompFreq.Items.Add(Compound.Monthly);

042	cmbCompFreq.Items.Add(Compound.Quarterly);

043	cmbCompFreq.Items.Add(Compound.SemiAnnually);

044	cmbCompFreq.Items.Add(Compound.Annually);

045	cmbCompFreq.SelectedItem = cmbCompFreq.Items[0];

046

//

047	// TODO: Add constructor code after the InitializeComponent() call.

048

//

049

}

050

051	private void BtnCalculateClick(object sender, System.EventArgs e)

052

{

053	decLabelMax = 10000000000M;

054

055	// memasukkan nilai yang diperlukan

056	double jumlahAwal = (double) nupJumlahAwal.Value;

057	double rate = (double) nupInterestRate.Value;

058	int years = (int) nupYears.Value;

059	Compound calcFrequency = (Compound) cmbCompFreq.SelectedItem;

060

061	// assign total value ke totalValue

062	decimal totalValue = 0;

063

064	// mengubah suku bunga ke desimal

065	rate = rate / 100;

066	int periods = 0;

067

068	// Menghitung saving dengan rumus : p=c(1+r/n)^nt

069	switch ( calcFrequency ) {

070	case Compound.Daily:

071	// Bunga harian

072	double dailyRate = rate / 365;

073	// Jumlah hari

074	periods = years * 365;

075	// calculate savings

076	jumlahAwal = jumlahAwal * Math.Pow((1 + dailyRate),(double)periods);

077

break;

078	case Compound.Monthly:

079	// Bunga per bulan

080	double monthlyRate = rate / 12;

081	// Jumlah bulan

082	periods = years * 12;

083	// calculate savings

084	jumlahAwal = jumlahAwal * Math.Pow((1 + monthlyRate),(double)periods);

085

break;

086	case Compound.Quarterly:

087	// Bunga per empat bulan

088	double quarterlyRate = rate / 4;

089	// how many quarters

090	periods = years * 4;

091	// calculate savings

092	jumlahAwal = jumlahAwal * Math.Pow((1 + quarterlyRate),(double)periods);

093

break;

094	case Compound.SemiAnnually:

095	// semi-annual interest

096	double semiAnnualRate = rate / 2;

097	// how many periods

098	periods = years * 2;

099	jumlahAwal = jumlahAwal * Math.Pow((1 + semiAnnualRate),(double)periods);

100

break;

101	case Compound.Annually:

102	// interest per year

103	double annualRate = rate;

104	// how many years

105	periods = years;

106	// calculate savings

107	jumlahAwal = jumlahAwal * Math.Pow((1 + annualRate),(double)periods);

108

break;

109

default:

110	// This code should never execute!

111	MessageBox.Show(this, "Ada Error");

112

break;

113

}

114	totalValue = (decimal) jumlahAwal;

115

116	// Menampilkan hasil perhitungan

117	if ( totalValue <= decLabelMax ) {

118	//...format the label to display a currency value

119	lblTotalTabungan.Text = String.Format("Rp. {0:###,###.##}", totalValue);

120

121

}

122

else {

123	MessageBox.Show("Jumlah melebihi nilai maximum");

124

}

125

}

126

}

127

}

Apabila tidak ada masalah, maka apabila di run akan muncul tampilan :

Semoga bermanfaat…