form1.cs

Visual C#2005程序设计教程

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace WindowsApplication5_8
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void label2_Click(object sender, EventArgs e)
        {

        }

        private void button1_Click(object sender, EventArgs e)
        {
            int n = 0;
            float h;
            h = float.Parse(textBox1.Text);
            while (h < 8844430)
            {
                n = n + 1;
                h = 2 * h;
            }
            textBox2.Text = n.ToString();
        }
    }
}