求一算法~~~~~~~标题要长~~~~~~~~~~~~~~

Question

问题描述不清..标题长也没用

Answer 1

    int n = 0;
            Console.WriteLine("请输入一个数:");
            n = Convert.ToInt32(Console.ReadLine());
            int i = 1;            while (System.Math.Pow(2, i) < n)
            {
                i++;
            }
            Console.WriteLine("{0}最接近2的{1}次方",n,i);