Console-算法-求0—7所能组成的奇数个数

using System;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            long sum = 4, s = 4;
            int j;
            for (j = 2; j <= 8; j++)    /* j is place of number*/
            {
                Console.WriteLine(sum);
                if (j <= 2)
                {
                    s *= 7;
                }
                else
                {
                    s *= 8;
                }
                sum += s;
            }
            Console.WriteLine("sum={0}",sum);
        }
    }
}

4
32
256
2048
16384
131072
1048576
sum=8388608
请按任意键继续. . .