// circle_all.cpp  has files  circle.h  test_circle.cpp  circle.cpp
//
// Demonstrate a very simple class and its test program all in one file


// circle.h    should be in a file by itself
//
// Define a class that can be used to get objects of type Circle.
// A class defines a data structure and the member functions
// that operate on the data strcuture.
// The name of the class becomes a type name.

class Circle  // the 'public' part should be first, the user interface
              // the 'private' part should be last, the safe data
{
  public:
    Circle(double X, double Y, double R);  // a constructor
    void Show();                           // a member function
  private:
    double Xcenter;
    double Ycenter;
    double radius;
};

// test_circle.cpp   should be in a file by itself
#include <iostream>
// #include "circle.h"   remove  //  when in a file by itself
using namespace std;

int main()
{
  Circle c1(1.0, 2.0, 0.5);  // construct an object named 'c1' of type 'Circle'
  Circle circle2(2.5, 3.0, 0.1);  // another object named 'circle2'

  c1.Show();       // tell the object c1 to execute the member function Show
  circle2.Show();  // circle2 runs its member function Show

  return 0;
}


// circle.cpp   should be in a file by itself
// implement the member functions of the class Circle
#include <iostream>
// #include "circle.h"   remove  //  when in a file by itself
using namespace std;

Circle::Circle(double X, double Y, double R)
{
  Xcenter = X;
  Ycenter = Y;
  radius  = R;
}

void Circle::Show()
{
  cout << "X, Y, R " << Xcenter << "  " << Ycenter << "  "
       << radius << endl;
}