using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms;namespace WindowsApplication1 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { int n; if (int.TryParse(textBox1.Text, out n)) { //為數字 int va = Int32.Parse(textBox1.Text); textBox2.Text = System.Convert.ToString(rfc(va)); } else { MessageBox.Show ("請輸入數字"); }
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;namespace WindowsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
} private void button1_Click(object sender, EventArgs e)
{
int n;
if (int.TryParse(textBox1.Text, out n))
{
//為數字
int va = Int32.Parse(textBox1.Text);
textBox2.Text = System.Convert.ToString(rfc(va));
}
else
{
MessageBox.Show ("請輸入數字");
}
}
private static double rfc(int g)
{
switch (g)
{
case 1:
return 1;
default:
return g * rfc(g - 1);
}
}
}
}
double sum = 1;
for (i = 1; i <= n; i++)
sum *= i;
MessageBox.Show( sum.ToString());
double sum = 1;
for (int i = 1; i <= 100; i++)
sum *= i;
Console.Write(sum);
http://topic.csdn.net/u/20090716/15/98238CCB-3600-49A6-A81B-E67345F0768A.html
http://topic.csdn.net/u/20090926/22/1c8f99b7-5222-479d-b68e-5571033087e4.html
如果不怕麻烦,就将1*2==2*2==4*3==12直到一定位数后,保存为文本,然后再对后续部份重新运算,然后,将文本转化为数字进行相加,再转换成为文本再长都放得下!