form.cpp

Go to the documentation of this file.

#include "form.h"
 
#include <iostream>
using namespace std;
 
Form::~Form() = default;
Quadrat::~Quadrat() = default;
Kreis::~Kreis() = default;
 
bool operator<(const Form &a, const Form &b)
{
    return a.area() < b.area();
}
 
bool kleiner (const Form *a, const Form *b)
{
    return a->area() < b->area();                      // uses  operator<(const Form &a, const Form &b)
}
 
 
ostream& operator<<(ostream& s, const Point2D& rhs)
{
    s << "(" << rhs.GetX() << "," << rhs.GetY() <<")";
    return s;
}
 
//  Output-Operator : Here we benefit from polymorphism
ostream& operator<<(ostream& s, const Form& rhs)
{
  s << rhs.classname() << " mit Mittelpunkt ";
  s << "(" << rhs.GetX() << "," << rhs.GetY() <<")";
  s << " hat ein Flaeche von " << rhs.area();
  return s;
}