HomeWork C++ ex

#include <iostream>

using namespace std;

double const PI = 3.14; // Global variable

double areaCircle (int r){
   double area = PI * r * r;
    std::cout << "Circle Area=" << area << std::endl;
    return area;
}

double perimeterCircle (int r){
   double perimeter =  PI * 2 * r;
    std::cout << "Circle perimeter=" << perimeter << std::endl;
    return perimeter;
}

int main()
{
  unsigned double r;
  cout << "Enter radius ";
  cin >> r ;

  areaCircle(r);
  perimeterCircle(r);
    return 0;
}

//A = π r²