//da se realizira klas pravougulnik chrez
//double a - duljina
//double b - shirina
//G4 + funkcii i mutatori
//2. klas kvadrat koito naslediava klas pravougulnik
#include <iostream>
using namespace std;
class Rect {
private:
double a;
double b;
public:
Rect(){
a=0;
b=0;
}
Rect (double _a, double _b){
if (_a<0 || _b<0){
Rect();
cerr<<"ERROR";
}
a=_a;
b=_b;
}
double getA() const{
return a;
}
double getB() const{
return b;
}
double rectArea(Rect r){
return ((r.getA) * (r.getB));
}
};
class Square: public Rect {
};