using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace ConsoleApplication4
{
class Circle
{
static float _PI;
int _Radius;
static Circle()
{
Circle._PI = 3.141F;
}
public Circle(int Radius)
{
this._Radius = Radius;
}
public float CalculateArea()
{
return Circle._PI * this._Radius * this._Radius;
}
}
class Program
{
static void Main(string[] args)
{
Circle C1 = new Circle(5);
float Area1 = C1.CalculateArea();
Console.WriteLine(“Area = {0}”, Area1);
Console.ReadLine();
Circle C2 = new Circle(6);
float Area2 = C2.CalculateArea();
Console.WriteLine(“Area = {0}”, Area2);
Console.ReadLine();
}
}
}