1 files changed, 77 insertions, 0 deletions
diff --git a/future_value1/FutureValue/frmFutureValue.cs b/future_value1/FutureValue/frmFutureValue.cs
new file mode 100644
index 0000000..2853365
--- /dev/null
+++ b/future_value1/FutureValue/frmFutureValue.cs
@@ -0,0 +1,77 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace FutureValue
+{
+	public partial class frmFutureValue : Form
+	{
+		public frmFutureValue()
+		{
+			InitializeComponent();
+		}
+
+		private void btnCalculate_Click(object sender, EventArgs e)
+		{
+			decimal monthlyInvestment = Convert.ToDecimal(txtMonthlyInvestment.Text);
+			decimal yearlyInterestRate = Convert.ToDecimal(txtInterestRate.Text);
+			int years = Convert.ToInt32(txtYears.Text);
+
+			int months = years * 12;
+			decimal monthlyInterestRate = yearlyInterestRate / 12 / 100;
+
+			decimal futureValue = this.CalculateFutureValue(
+				monthlyInvestment, monthlyInterestRate, months);
+			txtFutureValue.Text = futureValue.ToString("c");
+			txtMonthlyInvestment.Focus();
+		}
+
+		private decimal CalculateFutureValue(decimal monthlyInvestment,
+			decimal monthlyInterestRate, int months)
+		{
+			decimal futureValue = 0m;
+			for (int i = 0; i < months; i++)
+				futureValue = (futureValue + monthlyInvestment)
+					* (1 + monthlyInterestRate);
+			return futureValue;
+		}
+
+		private void ClearFutureValue(object sender, EventArgs e)
+		{
+			txtFutureValue.Text = "";
+		}
+
+		private void frmFutureValue_DoubleClick(object sender, EventArgs e)
+		{
+			txtMonthlyInvestment.Text = "";
+			txtInterestRate.Text = "";
+			txtYears.Text = "";
+			txtFutureValue.Text = "";
+			txtMonthlyInvestment.Focus();
+		}
+
+		private void txtInterestRate_DoubleClick(object sender, EventArgs e)
+		{
+			txtInterestRate.Text = "12";
+		}
+		private void txtYears_DoubleClick(object sender, EventArgs e)
+		{
+			if (txtYears.Text == "")
+				txtYears.Text = "1";
+			else
+				txtYears.Text = (int.Parse(txtYears.Text)
+					+ 1).ToString();
+		}
+
+		private void btnExit_Click(object sender, EventArgs e)
+		{
+			this.Close();
+		}
+	}
+}