误差：＆QUOT;一个对象引用是所必需的非静态字段，方法或属性...＆QUOT; [英] Error: "an object reference is required for the non-static field, method or property..."

问题描述

林创建于C＃的应用程序。它的功能是evualuate如果给定是素数，如果相同的交换数是素为好。当我建立我的Visual Studio解决方案，它说：对象引用是必需的非静态字段，方法或属性...。有林的volteado和siprimo的方法这个问题。
你能告诉我在哪里的问题，我怎么能解决这个问题？谢谢！

 命名空间的ConsoleApplication1
{
    类节目
    {
        静态无效的主要（字串[] args）
        {
            Console.Write（写一个数字：）;
            长= Convert.ToInt64（到Console.ReadLine（））; //一个是由用户给定的数
            长的av = volteado（一）; // AV是一，但换            如果（siprimo（一）==假放;＆安培; siprimo（AV）== FALSE）
                Console.WriteLine（原件及交换数字是素数。）;
            其他
                Console.WriteLine（一个数字的心不是主要的。）;
            到Console.ReadLine（）;
        }
        私人布尔siprimo（长）
        {//评估如果所接收的数是素
            布尔SP = TRUE;
            为（长K = 2; K＆LT; = A / 2; k ++）
                如果（A％K == 0）SP = FALSE;
            返回SP;
        }
        私人长期volteado（长）
        {//交换收到的号码
            长V = 0;
            而（一个大于0）
            {
                V = 10 * V +一％10;
                一个/ = 10;
            }
            返回伏;
        }
    }
}
 

解决方案

您不能从静态方法访问非静态成员。 （请注意，的Main（）是静态的，这是净的要求）。只要siprimo和volteado静态的，通过将static关键字在他们面前。例如：

 静态私人长期volteado（长）
 

Im creating an application on C#. Its function is to evualuate if a given is prime and if the same swapped number is prime as well. When I build my solution on Visual Studio, it says that "an object reference is required for the non-static field, method or property...". Im having this problem with the "volteado" and "siprimo" methods. Can you tell me where is the problem and how i can fix it? thank you!

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.Write("Write a number: ");
            long a= Convert.ToInt64(Console.ReadLine()); // a is the number given by the user


            long av = volteado(a); // av is "a" but swapped

            if (siprimo(a) == false && siprimo(av) == false) 
                Console.WriteLine("Both original and swapped numbers are prime.");
            else
                Console.WriteLine("One of the numbers isnt prime.");
            Console.ReadLine();


        }
        private bool siprimo(long a)
        {// evaluate if the received number is prime
            bool sp = true;
            for (long k = 2; k <= a / 2; k++)
                if (a % k == 0) sp = false;
            return sp;
        }
        private long volteado(long a)
        {// swap the received number
            long v = 0;
            while (a > 0)
            {
                v = 10 * v + a % 10;
                a /= 10;
            }
            return v;
        }
    }
}

解决方案

You can't access non-static members from a static method. (Note that Main() is static, which is a requirement of .Net). Just make siprimo and volteado static, by placing the static keyword in front of them. e.g.:

 static private long volteado(long a)

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