C#程序设计打印出100以内的素数，一行显示5个

static void Main(string[] args)

        {

            int i, count = 0;

            for (i = 2; i <= 100; i++)

            {

                if (primeNum(i))

                {

                    Console.Write("{0}  ", i);

                    count++;

                    if (count % 5 == 0)

                    {

                        Console.WriteLine();

                    }

                }

            }

        }

        public static bool primeNum(int n)

        {

            int i, flag = 0;

            bool ye;

            for (i = 2; i < n; i++)

            {

                if (n %i == 0)

                {

                    flag = 1;

                    break;

                }

                else

                    flag = 0;

            }

            if (flag == 0)

                ye = true;

            else

                ye = false;

            return ye;

        }

for (int i=2 ; i<=100 ;i++)
{
int count = 0;
for (int j= 2; j<= Math.Sqrt(i); j++)
{
if (i % j != 0)
{
continue;
}
count++;
}
if (count == 0)
{
Response.Write(i.ToString()+" ");
}
}

楼上正解

答案很好，我很满意