//Main
namespace Fibonacci
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("Would you like to know which Fibonacci Numbers：");
int number = Convert.ToInt32(Console.ReadLine());
//
Function obj = new Function();
Console.WriteLine();
Console.Write("The {0} Fibonacci number is：{1}", number, obj.Fibonacci(number));
//
Console.WriteLine();
Function obj2 = new Function(number);
Console.Write("The {0} Fibonacci number is：{1}", number, obj2.BottomUpNotRecursion(number));
//
Console.WriteLine();
Console.Write("The {0} Fibonacci number is：{1}", number, obj2.TopDownRecursion(number));
Console.ReadKey();
}
}
}
</div>
//Class
namespace Fibonacci
{
class Function
{
private int[] array;
public Function()
{
}
/// <summary>
/// Function
/// </summary>
/// <param name="length"></param>
public Function(int length)
{
if (length > 0)
{
array = new int[length + 1];
array[0] = 1;
array[1] = 1;
}
if (length == 0)
{
array = new int[1];
array[0] = 1;
}
}
/// <summary>
/// Fibonacci数列定义为：
/// 无穷数列1，1，2，3，5，8，13，21，34，55，……
/// ┌ 1 n=0
/// F(n)=│ 1 n=1
/// └ F(n-1)+F(n-2) n>1
/// </summary>
/// <param name="number">第几个斐波那契数</param>
/// <returns></returns>
public int Fibonacci(int number)
{
if (number <= 1)
{
return 1;
}
else
{
return Fibonacci(number - 1) + Fibonacci(number - 2);
}
}
/// <summary>
/// 动态规划思想：
/// 1.自底向上非递归算法
/// </summary>
/// <param name="number"></param>
/// <returns></returns>
public int BottomUpNotRecursion(int number)
{
int copynumber = 0;
if (number < 2)
{
copynumber = 1;
}
else
{
int one = array[0];
int two = array[1];
for (int i = 2; i < array.Length; i++)
{
&nbs