谢谢！！！

public long jiechen(int n)
{
   long i,j;
   if(n==0)
      i=1;
   else
    {
       j=f(n-1);
       i=n*j;   
     }
return(i);
}
递归

public logn jiechen(int n)
{
long i=1;
logn j=1;
if(n>1)
{
for(i;i<n;i++)
{
j=i*j;
}
}
else
{j=1;}
return(j);
}
正常情况

看看这个，(*^__^*) 嘻嘻……，

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace 求阶乘
{
    class Program
    {
        //计算每个数的阶乘,递归函数
        static double f(int n)
        {
            if (n == 1)
                return 1;
            else
                return n * f(n - 1);
        }
        //计算s(n)=1!+2!+3!+****+n!
        static double S(int n)
        {
            double total = 0;
            for (int i = 1; i <= n; i++)
            {
                total += f(i);
            }
            return total;
        }

        static void Main(string[] args)
        {
            while (true)
            {
                Console.WriteLine("请输入n值：");
                int n = Convert.ToInt32(Console.ReadLine());
                Console.WriteLine("{0}！的结果为{1}",n, S(n));
            }

        }
    }
}

N！不是示1!-N!之和

[ 本帖最后由 名沁 于 2010-6-15 08:38 编辑 ]

4楼那是什么，额程序啊