#include <iostream>
using namespace std;
//  class Patterns {
//  void square (){
// for (int i=0; i<5; i++){
//  cout<<"__";

// }



// }


// };
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;
       }



        Area (int radius , int diameter){
      float result = radius *diameter; 
      cout<<result<<endl;

}
    Area (int radius , int diameter,int pie){
      float result = radius *diameter; 
      cout<<result<<endl;

}
};




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

   Area c2 (45,5);
   Area c3(45,56,6);
  



    return 0;
}