用C#求出数列2/1，3/2，5/3，8/5，13/8，21/13...的前20项之和
如题谢谢！ --------------------编程问答--------------------
--------------------编程问答--------------------
static void Main(string[] args)
{
int length = 20;
double a, b, c;//分子
int A, B, C;//分母
a = 2; b = 3;
A = 1; B = 2;
double sum = a / A + b / B;
c = a + b;
C = A + B;
for (int i = 2; i < length; i++)
{
Console.WriteLine(c + "/" + C);
sum += c / C;
a = b;
b = c;
c = a + b;
A = B;
B = C;
C = A + B;
}
Console.WriteLine("=" + sum);
Console.Read();
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace ConsoleApplication5
{
class Program
{
static void Main(string[] args)
{
double Total = 0;
for (int i = 0; i < 20; i++)
{
double NR = GetN(2 + i);
double MR = GetN(1 + i);
double R = NR / MR;
Total += R;
Console.WriteLine(NR.ToString() + "/" + MR.ToString()
+ "=" + R.ToString());
}
Console.WriteLine(Total.ToString());
Console.Read();
}
static double GetN(int N)
{
if (N == 0 || N == 1)
return 1;
return GetN(N - 2) + GetN(N - 1);
}
}
}
0分？
作业吧 --------------------编程问答-------------------- 作业题发到这来还不给分，寒…… --------------------编程问答-------------------- 鉴定结果：超级懒人 --------------------编程问答--------------------
鉴定有误，这不是懒，是根本就不会，只想粘贴 --------------------编程问答--------------------
批准不准毕业 --------------------编程问答-------------------- for循环二十个数列的值。累加 --------------------编程问答-------------------- 自己再懒一个一个输入 然后相加也可以啊
超级懒 --------------------编程问答--------------------
先抄代码一百遍 --------------------编程问答-------------------- public class Gradientcs3
{
public static double sum=0;
static void Main()
{
int a = 1;
int b = 1;
Sumarry(a, b,0);
}
public static void Sumarry(int a,int b,int count)
{
if (count == 20)
return;
sum +=(double)(a + b) / a;
count++;
Sumarry(a + b, a,count);
}
} --------------------编程问答-------------------- haha
补充：.NET技术 , C#
