public circle(double x, double y, double r)
public void setx (double x)
public void sety (double y)
public void setr (double r)
public override string ToString()
TEXT="X=" + this.x+ "\tY=" +this.y+ "\tR=" +this.r;
public double circumference()
public static void Main()
circle C1= new circle(2,3,4);
Console.WriteLine("the space={0}\t the circumferenc={1}\n",C1.SPACE(),C1.circumference());
circle C2= new circle(3,5,6);
Console.WriteLine("the space={0}\t the circumferenc={1}\n",C2.SPACE(),C2.circumference());
circle C3= new circle(5,6,7);
Console.WriteLine("the space={0}\t the circumferenc={1}\n",C3.SPACE(),C3.circumference());