c#控制台施用 输出斐波那契数 求指教

c#控制台应用 输出斐波那契数 求指教！
新人求指教

[解决办法]

C# code

public class MainClass                   {                   public static void Main()                   {                   Console.WriteLine(Foo(30));                   }                   public static int Foo(int i)                   {                   if (i <= 0)                   return 0;                   else if(i > 0 && i <= 2)                   return 1;                   else return Foo(i -1) + Foo(i - 2);                   }                   }
[解决办法]
C# code
 static void Main(string[] args)        {            Console.WriteLine(fab(3));//n表示第几个斐波那契数        }      static  int fab(int n)        {            if (n == 1 || n == 2)                return 1;            else                return fab(n - 1) + fab(n - 2);        }
[解决办法]
C# code
public class MainClass                   {                   public static void Main()                   {                   Console.WriteLine(Foo(10));                   }                   public static int Foo(int i)                   {                   if (i <= 0)                   return 0;                   else if(i > 0 && i <= 2)                   Console.WriteLine("1 ");                   else                   Console.WriteLine((Foo(i -1) + Foo(i - 2)).ToString());                       }                   }
[解决办法]
C# code
int a = 1, b = 1;                        for (int i = 0; i < 10; i++)            {                int temp = a;                if (i < 2)                    Console.WriteLine(temp);                else                {                    Console.WriteLine(a+b);                    a = b;                    b = temp + b;                                   }            }