常用演算法(C#): 計算 1+2(2次方)+3(3次方)+...+n(n次方)的值

來源:互聯網
上載者:User

using System;
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));
    }
  }
}
文章來源: http://www.cnblogs.com/ziyiFly/archive/2008/09/10/1288061.html

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