using System;
using System.Windows.Forms;
namespace SumOfSeries
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
double x, precision;
try
{
x = double.Parse(textBox1.Text);
precision = double.Parse(textBox2.Text);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
if (Math.Abs(x) >= 1)
{
MessageBox.Show("Введите x, такое, что |x| < 1", "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
double sum = 0, term = x, n = 1;
while (Math.Abs(term) > precision)
{
sum += term;
term /= ++n;
}
textBox3.Text = sum.ToString();
textBox4.Text = n.ToString();
}
}
}