1  #include <iostream>
 2  
 3  using namespace std;
 4  
 5  class Circle
 6  {
 7  private:
 8      int radius;
 9  
10  public:
11      Circle(int radius = 0)
12      {
13          this->radius = radius;
14      };
15      void setRadius() {
16          cout << "Enter the radius of the circle: ";
17          cin >> radius;
18      }
19      void calcArea() const {
20          cout << "Area of Circle: " << 3.14 * (radius * radius) << endl;
21      }
22      ~Circle()
23      {
24      };
25  
26  };
27  
28  int main()
29  {
30      Circle circle;
31      circle.setRadius();
32      circle.calcArea();
33  }