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 WinApp5_2dowhile
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            double productionValue=100, rise;
            rise=double.Parse(txtRise.Text)/100;
            int years = 0;
            do
            {
                productionValue = productionValue * (1 + rise);
                years += 1;
            } while (productionValue < 200);
            lblResult.Text = years + "年后产值为:"+(Math.Round(productionValue))
                +"%";
        }
    }
}