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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();
}
}
}
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