01.txt

算法设计与分析实验报告

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

namespace 大数阶乘
{
	/// <summary>
	/// Form1 的摘要说明。
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.Label label2;
		private System.Windows.Forms.TextBox textBox1;
		private System.Windows.Forms.Button button1;
		private System.Windows.Forms.Label label3;
		private System.Windows.Forms.RichTextBox richTextBox1;
		private System.Windows.Forms.Label label4;
		private System.Windows.Forms.Label label5;
		private System.Windows.Forms.Label label6;
		/// <summary>
		/// 必需的设计器变量。
		/// </summary>
		private System.ComponentModel.Container components = null;

		public Form1()
		{
			//
			// Windows 窗体设计器支持所必需的
			//
			InitializeComponent();

			//
			// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
			//
		}

		/// <summary>
		/// 清理所有正在使用的资源。
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows 窗体设计器生成的代码
		/// <summary>
		/// 设计器支持所需的方法 - 不要使用代码编辑器修改
		/// 此方法的内容。
		/// </summary>
		private void InitializeComponent()
		{
			System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(Form1));
			this.label1 = new System.Windows.Forms.Label();
			this.label2 = new System.Windows.Forms.Label();
			this.textBox1 = new System.Windows.Forms.TextBox();
			this.button1 = new System.Windows.Forms.Button();
			this.label3 = new System.Windows.Forms.Label();
			this.richTextBox1 = new System.Windows.Forms.RichTextBox();
			this.label4 = new System.Windows.Forms.Label();
			this.label5 = new System.Windows.Forms.Label();
			this.label6 = new System.Windows.Forms.Label();
			this.SuspendLayout();
			// 
			// label1
			// 
			this.label1.Font = new System.Drawing.Font("宋体", 14.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
			this.label1.Location = new System.Drawing.Point(96, 16);
			this.label1.Name = "label1";
			this.label1.Size = new System.Drawing.Size(168, 23);
			this.label1.TabIndex = 0;
			this.label1.Text = "大整数阶乘计算器";
			// 
			// label2
			// 
			this.label2.Location = new System.Drawing.Point(16, 72);
			this.label2.Name = "label2";
			this.label2.Size = new System.Drawing.Size(72, 16);
			this.label2.TabIndex = 1;
			this.label2.Text = "输入数据：";
			// 
			// textBox1
			// 
			this.textBox1.ImeMode = System.Windows.Forms.ImeMode.Disable;
			this.textBox1.Location = new System.Drawing.Point(88, 67);
			this.textBox1.Name = "textBox1";
			this.textBox1.Size = new System.Drawing.Size(120, 21);
			this.textBox1.TabIndex = 2;
			this.textBox1.Text = "";
			this.textBox1.TextChanged += new System.EventHandler(this.textBox1_TextChanged);
			this.textBox1.SystemColorsChanged += new System.EventHandler(this.textBox1_SystemColorsChanged);
			// 
			// button1
			// 
			this.button1.Location = new System.Drawing.Point(248, 64);
			this.button1.Name = "button1";
			this.button1.Size = new System.Drawing.Size(64, 24);
			this.button1.TabIndex = 3;
			this.button1.Text = "计算";
			this.button1.Click += new System.EventHandler(this.button1_Click);
			// 
			// label3
			// 
			this.label3.Location = new System.Drawing.Point(16, 112);
			this.label3.Name = "label3";
			this.label3.Size = new System.Drawing.Size(72, 16);
			this.label3.TabIndex = 4;
			this.label3.Text = "计算结果：";
			// 
			// richTextBox1
			// 
			this.richTextBox1.Location = new System.Drawing.Point(88, 112);
			this.richTextBox1.Name = "richTextBox1";
			this.richTextBox1.Size = new System.Drawing.Size(256, 184);
			this.richTextBox1.TabIndex = 5;
			this.richTextBox1.Text = "";
			// 
			// label4
			// 
			this.label4.Location = new System.Drawing.Point(16, 320);
			this.label4.Name = "label4";
			this.label4.Size = new System.Drawing.Size(80, 16);
			this.label4.TabIndex = 6;
			this.label4.Text = "计算结果有：";
			// 
			// label5
			// 
			this.label5.Location = new System.Drawing.Point(96, 320);
			this.label5.Name = "label5";
			this.label5.Size = new System.Drawing.Size(48, 16);
			this.label5.TabIndex = 7;
			this.label5.Click += new System.EventHandler(this.label5_Click);
			// 
			// label6
			// 
			this.label6.Location = new System.Drawing.Point(144, 320);
			this.label6.Name = "label6";
			this.label6.Size = new System.Drawing.Size(32, 16);
			this.label6.TabIndex = 8;
			this.label6.Text = "位。";
			// 
			// Form1
			// 
			this.AcceptButton = this.button1;
			this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
			this.ClientSize = new System.Drawing.Size(376, 350);
			this.Controls.Add(this.label6);
			this.Controls.Add(this.label5);
			this.Controls.Add(this.label4);
			this.Controls.Add(this.richTextBox1);
			this.Controls.Add(this.label3);
			this.Controls.Add(this.button1);
			this.Controls.Add(this.textBox1);
			this.Controls.Add(this.label2);
			this.Controls.Add(this.label1);
			this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));
			this.Name = "Form1";
			this.Text = "C#小程序";
			this.Load += new System.EventHandler(this.Form1_Load);
			this.ResumeLayout(false);

		}
		#endregion

		/// <summary>
		/// 应用程序的主入口点。
		/// </summary>
		[STAThread]

		static void Main() 
		{
			Application.Run(new Form1());
		}
		public void GetValue()
		{
			int[] arr=new int[100000];
			int m,i,j,c,t;
	    	if(int.Parse(textBox1.Text)<2||int.Parse(textBox1.Text)>10000)
			{
				MessageBox.Show("请输入一个大于1的数！");
				this.textBox1.Focus();
				this.textBox1.SelectionStart=0;
				this.textBox1.SelectionLength=textBox1.TextLength;
			}

			arr[0]=1; m=1;
			for(i=2;i<=int.Parse(textBox1.Text);i++)
			{
				for(c=0,j=0;j<m;j++)
				{
					t=arr[j]*i+c;
					arr[j]=t%10;
					c=t/10;
				}
				while(c!=0)
				{
					arr[m++]=c%10;
					c/=10;
				}
			}
			string temp="";
			string num="";
			int n=0;
			for(i=m-1;i>=0;i--)
			{
				temp+=arr[i];
				richTextBox1.Text=temp;
				n++;

			}
			num+=n;
			label5.Text=num;
			
		}

		private void button1_Click(object sender, System.EventArgs e)
		{
			try
			{
				GetValue();
			}
			catch
			{
				MessageBox.Show("请输入一个正整数！");
				this.textBox1.Focus();
				this.textBox1.SelectionStart=0;
				this.textBox1.SelectionLength=textBox1.TextLength;
			}
		}

		private void textBox1_TextChanged(object sender, System.EventArgs e)
		{

		}

		private void Form1_Load(object sender, System.EventArgs e)
		{		
		}

		private void label5_Click(object sender, System.EventArgs e)
		{	
		}

		private void textBox1_SystemColorsChanged(object sender, System.EventArgs e)
		{
		
		}
	}
}