#include <iostream>
using namespace std;


class Circle
{
private:
	float radius,area;
public :
	void setRadius(void);
	float getArea(void);
	Circle(void);
	~Circle(void);
};

void Circle ::setRadius(void)
{
	cout << "Enter radius of circle : ";
	cin >> radius;
}
float Circle ::getArea(void)
{
	area = 3.142 * radius * radius;
	return area;
}

Circle ::Circle(void)
{
}
Circle ::~Circle(void)
{
}


void main (void)
{
	Circle myCircle;
	float area;
	myCircle.setRadius();
	area = myCircle.getArea();
	cout << "area of circle is " << area << endl;
}