// Datoteka: figure.hpp

#ifndef FIGURE_DEF 
#define FIGURE_DEF 
#include <math.h> 

class Figura { 
private: 
static int count; 
static int id;
public: 
Figura() { count++; } 
~Figura() { count--; } 
virtual int getCount() const { return count; } 
virtual int getId() const { return id; } 
virtual double getO() const=0; 
virtual double getP() const=0; 
}; 

class Krug : public Figura { 
private: 
double r; 
static int count; 
static int id; 
public: 
Krug(double rr=1) { r=rr; count++; } 
~Krug() { count--; } 
double getR() const { return r; } 
int getCount() const { return count; } 
int getId() const { return id; } 
double getO() const { return 2*r*M_PI; } 
double getP() const { return r*r*M_PI; } 
}; 

class Trougao : public Figura { 
private: 
double a, b, c; 
static int count; 
static int id; 
public: 
Trougao(double aa=3, double bb=4, double cc=5) { 
a=aa; b=bb; c=cc; count++; 
} 
Trougao(const Trougao &t) { a=t.a; b=t.b; c=t.c; count++; } 
~Trougao() { count--; } 
double getA() const { return a; } 
double getB() const { return b; } 
double getC() const { return c; } 
int getCount() const { return count; } 
int getId() const { return id; } 
double getO() const { return a+b+c; } 
double getP() const { 
double s=(a+b+c)/2; 
return sqrt(s*(s-a)*(s-b)*(s-c)); 
} 
}; 

class Pravougaonik : public Figura { 
private: 
double a, b; 
static int count; 
static int id;
public: 
Pravougaonik(double aa=1, double bb=2) { 
a=aa; b=bb; count++; 
} 
Pravougaonik(const Pravougaonik &p) { 
a=p.a; b=p.b; count++; 
} 
~Pravougaonik() { count--; } 
double getA() const { return a; } 
double getB() const { return b; } 
int getCount() const { return count; } 
int getId() const { return id; } 
double getO() const { return 2*a + 2*b; } 
double getP() const { return a*b; } 
}; 

class Kvadrat : public Pravougaonik { 
private: 
static int count; 
static int id; 
public: 
Kvadrat(double aa=1) : Pravougaonik(aa,aa) { 
count++; 
} 
Kvadrat(const Kvadrat &k) : Pravougaonik((Pravougaonik)k) { 
count++; 
} 
~Kvadrat() { count--; } 
int getCount() const { return count; } 
int getId() const { return id; } 
}; 

#endif 


// Datoteka: figure.cpp

#include "figure.hpp" 

int Figura::id=0; 
int Figura::count=0; 
int Krug::id=1; 
int Krug::count=0; 
int Trougao::id=2; 
int Trougao::count=0; 
int Pravougaonik::id=3; 
int Pravougaonik::count=0; 
int Kvadrat::id=4; 
int Kvadrat::count=0; 


// Datoteka: main.cpp

#include "figure.hpp" 
#include <iostream> 
using namespace std;

void printFigura(const Figura &f) { 
cout<<"Vrsta figure: "; 
switch(f.getId()){ 
case 0 : cout<<"FIGURA"<<endl; break; 
case 1 : cout<<"KRUG"<<endl; break; 
case 2 : cout<<"TROUGAO"<<endl; break; 
case 3 : cout<<"PRAVOUGAONIK"<<endl; break;
case 4 : cout<<"KVADRAT"<<endl; break; 
} 
cout<<"Obim: "<<f.getO()<<endl; 
cout<<"Povrsina: "<<f.getP()<<endl; 
cout<<"Broj aktuelnih objekata: "<<f.getCount()<<endl; 
} 

int main() { 
Krug k1, k2(4); 
Trougao t1, t2(2,5,5); 
Pravougaonik p1, p2(5,6); 
Kvadrat kv1, kv2(5); 
printFigura(k1); 
printFigura(k2); 
printFigura(t1); 
printFigura(t2); 
printFigura(p1); 
printFigura(p2); 
printFigura(kv1); 
printFigura(kv2); 
return 0; 
}