class circulo

using System;
using System.Collections.Generic;
using System.Text;

namespace figuras
{
class Circulo
{
double radio;
public Circulo()
{
radio = 0;
}
public Circulo(double R)
{
radio = R;
}
public void Asignarradio(double rad)
{
radio = rad;
}
public double obtenerradio()
{
return radio;
}
public double Area()
{
double A = Math.PI * Math.Pow(radio, 2);
return A;
}
public double circunferencia()
{
double P = 2 * Math.PI * radio;
return P;
}

}
}