#include <iostream>
using namespace std;
const double PI=3.14;
class Circle
{
private:
	double radius,length,area;
public:
	Circle(double r=0)
	{
		setr(r);
		length=2*PI*radius;
		area=PI*radius*radius;
	}
	Circle(Circle &c)
	{
		radius=c.radius;
		length=c.length;
		area=c.area;
	}
	void print()
	{
		cout<<"radius= "<<radius<<endl;
		cout<<"length= "<<length<<endl;
		cout<<"area= "<<area<<endl;
	}
	void setr(double r)
	{
		radius=r;
	}
};
int main()
{
	Circle c1(10),c2(c1);
	c1.print();
	c2.print();
	return 0;
}
