class_inline.cpp

#include <iostream>
using namespace std;
#define PI 3.142

class circle{

private:
	double radius;

public:
	void setRadius(double);
	double getRadius() const{
		return radius;
	}
	double getArea() const{
		return PI*radius*radius;
	}
	double getPerimeter() const{
		return 2*PI*radius;
	}

};
void circle::setRadius(double r){
	radius = r;
}

int main(){

	circle c1;
	double r;
	
	cout <<"Enter radius for c1" <<endl;
	cin >> r;
	
	c1.setRadius(r);
	
	cout<<"Value entered for radius in c1 circle is: " <<c1.getRadius()<<endl;
	cout<<"Area of c1 is: " <<c1.getArea()<<endl;
	cout<<"Perimeter of c1 is: " <<c1.getPerimeter()<<endl;
	return 0;

}