求1-100之间的所有素数

 	    int sum = 1;            Console.Write(2+"\n");            for (int m = 3; m<=100;m+=2 )            {                bool a = true;                if (m % 2 == 0)                {                    a = false;                }                else                {                    for (int i = 3; i < m / 2; i+=2)                    {                        if (m % i == 0)                        {                            a = false;                            break;                        }                    }                }                                if(a==true)                {                    sum++;                    Console.Write(m.ToString()+"\n");                }            }            Console.WriteLine();            Console.WriteLine("total:"+sum);