using System;
文章來源: http://www.cnblogs.com/ziyiFly/archive/2008/09/10/1288061.html
using System.Collections.Generic;
using System.Text;
namespace ExSum
{
class Sum
{
public long sum(int num)
{
long sum = 0;
for (int i = 1; i <= num; i++)
{
long f = 1;
//求i的i次方
for (int j = 1; j <= i; j++)
{
f *= i;
}
sum += f;
}
return sum;
}
static void Main(string[] args)
{
Console .Write("請輸入一個整數:");
int num=Convert.ToInt32 (Console.ReadLine());
Sum s=new Sum();
Console.WriteLine("1的1次方到{0}的{1}次方的和為{2}", num,num,s.sum (num));
}
}
}