using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace ConsoleApp1 //函数的递归调用 { //F(n)= F(n-1)+F(n-2)... F(1)=3; F(0)=2; 求F(40) class Program { static int F(int n) { if (n == 0) return 2; //递归终止的条件 if (n == 1) return 3; return F(n - 1) + F(n - 2); } static void Main(string[] args) { int res1= F(40); Console.Write(res1); int res2 = F(2); Console.Write(res2); Console.ReadKey(); } } }