斐波那契数列的递归算法实现的源代码，计算机算法设计与分析作业1-Fibonacci series recursive algorithm source code, design and analysis of computer algorithms operating 1

对于斐波那契数列进行运算的一个控制台应用程序，完美解决了斐波那契数列运算的结果。输入任意数字即显示对应运算结果-For Fibonacci column a console application operations, the perfect solution Fibonacci result that the number of columns lease operations. Enter any number corresponding to the calculation result

f(n)=f(n-1)+f(n-2) f(0)=f(1)=1，求斐波那契数列第20项，分别用循环和递归的方式，比较时间效率。提示：可以使用c函数clock取出当前系统时间，计算前后各一次，两次相减除以每秒的时钟数，就可以得到以秒为单位的差距-f (n) = f (n-1)+ f (n-2) f (0) = f (1) = 1, Item 20 seeking Fibonacci number Fibonacci sequence that were circulating and recursi