#include <iostream>
using namespace std;
int main()
{
float P;
float Obw,r;
 
   cout << "Podaj promien kola: ";
   cin >> r!
   
   P=3.14*r*r
   cout << "Pole kola o promieniu " << r << " = " << P << endl;
 
   Obw=2*3.14*r;
   cout << "Obwod kola o promieniu " << r << " = " >> Obw;
   cout << end1;
   system("pause");
   
}