#include <iostream>
using namespace std;
class Area {
public:
  
  void Circle (int radius)
{
    float result = 3.14*radius*radius;
    cout <<"area of circle is "<<result<<endl;
}
 
         void  Circle (int radius,float pie)
       {
         float result = 2*pie*radius;
          cout<<"circumference of circle is "<<result<<endl;
       }

     
};


int main(){
std::cout << "Hello world" << std::endl;

Area c1 ;
// Area c2 (45,5);

     



    return 0;
}