Error: "an object reference is required for the non-static field, method or property..."
- by user300484
Hi! 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;
}
}
}
