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static int Fibonacci(int index)
{
return index <= 2 ? 1 : Fibonacci(index - 1) + Fibonacci(index - 2);
}
using System;
using System.Threading;public class Fibonacci
{
public Fibonacci(int n, ManualResetEvent doneEvent)
{
_n = n;
_doneEvent = doneEvent;
} // Wrapper method for use with thread pool.
public void ThreadPoolCallback(Object threadContext)
{
int threadIndex = (int)threadContext;
Console.WriteLine("thread {0} started...", threadIndex);
_fibOfN = Calculate(_n);
Console.WriteLine("thread {0} result calculated...", threadIndex);
_doneEvent.Set();
} // Recursive method that calculates the Nth Fibonacci number.
public int Calculate(int n)
{
if (n <= 1)
{
return n;
} return Calculate(n - 1) + Calculate(n - 2);
} public int N { get { return _n; } }
private int _n; public int FibOfN { get { return _fibOfN; } }
private int _fibOfN; private ManualResetEvent _doneEvent;
}public class ThreadPoolExample
{
static void Main()
{
const int FibonacciCalculations = 10; // One event is used for each Fibonacci object
ManualResetEvent[] doneEvents = new ManualResetEvent[FibonacciCalculations];
Fibonacci[] fibArray = new Fibonacci[FibonacciCalculations];
Random r = new Random(); // Configure and launch threads using ThreadPool:
Console.WriteLine("launching {0} tasks...", FibonacciCalculations);
for (int i = 0; i < FibonacciCalculations; i++)
{
doneEvents[i] = new ManualResetEvent(false);
Fibonacci f = new Fibonacci(r.Next(20,40), doneEvents[i]);
fibArray[i] = f;
ThreadPool.QueueUserWorkItem(f.ThreadPoolCallback, i);
} // Wait for all threads in pool to calculation...
WaitHandle.WaitAll(doneEvents);
Console.WriteLine("All calculations are complete."); // Display the results...
for (int i= 0; i<FibonacciCalculations; i++)
{
Fibonacci f = fibArray[i];
Console.WriteLine("Fibonacci({0}) = {1}", f.N, f.FibOfN);
}
}
}
int start[30];
int start[1]=1;
int start[2]=2;for(int i=1;i<=30-2;i++)
{
start[i+2]=start[i]+start[i+1];
}
Response.write(start[i+2]);
{
return index < 2 ? 1 : Fibonacci(index - 1) + Fibonacci(index - 2);
}
这样才对吧。
public int Calculate(int n)
{
if (n <= 1)
{
return n;
} return Calculate(n - 1) + Calculate(n - 2);
}ps:没注意到4楼的错了...<=1或<2才对...
还可以省:
static int f(int i)
{
return i<= 2 ? 1 : f(i- 1) + f(i- 2);
}
public static void main(String args[]){
for(int n = 1; n<=30; n++){
System.out.println(Fibonacci(n));
}
}
public static int Fibonacci(int j)
{
return j <= 2 ? 1 : Fibonacci(j - 1) + Fibonacci(j - 2);
}}