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

namespace WindowsApplication5
{
    public partial class Form1 : Form
    {
        string s;
        public Form1()
        {
            InitializeComponent();
        }
        public void f(int n,string a,string b,string c)
        {
            if (n>1)
            {
                f(n-1,a,c,b);
                s += a + "--->" + c + "\n";
                f(n-1,b,a,c);
            }
            else if(n==1)
                s += a + "--->" + c + "\n";
            else
                MessageBox.Show("笨蛋!"+"\t"+"n的值不能小于1","出错信息",MessageBoxButtons.RetryCancel,MessageBoxIcon.Information);
        }
        private void button1_Click(object sender, EventArgs e)
        {
            int n;
            n = Int32.Parse(textBox1.Text);
            f(n,"a","b","c");
            label2.Text = s;
        }
    }
}











小弟不才,想借地方顺便问一下,,,label标签属性中没能找到添加竖直方向的滚动条那个选项,能否在代码中定义,如果能,可以麻烦大虾告诉下么.
谢谢了|!!!!!!!!!!!!!