c#迭代算法

            //用迭代算法算出第m个值

　　　　//1,1,2,3,5,8...;
           //{1,0+1,1+1,1+2,2+3 ,3+5}

　　　static void Main(string[]   args)//Main方法 必须为静态方法  可以void (无返回参数)或者int (整型返回类型)
        {
            int sum = 1;
            int persum= 0;
            int m = Convert.ToInt32(Console.ReadLine());
            int [] bn=new int[m+1];

          
            bn[0] = 0;
            for (int i = 1; i<= m; i++)
            {
                bn[i] = bn[i-1];
                sum = sum + bn[i];
                bn[i] = persum;
                persum= sum;

                Console.Write(sum + ",");            
              

            }
            Console.ReadKey();
        }