#include <iostream>
#include <cmath>
using namespace std;

int 
main(void)
{
	double dA, dB;
	
	double dPrva;
	cout<<"Unesite prvu stranicu pravougaonika->";
	cin>>dPrva;

	double dDruga;
	cout<<"Unesite drugu stranicu pravougaonika->";
	cin>>dDruga;

	cout<<"Stranice pravougaonika su: \n";
	cout<<"a ="<<dA<<"b ="<<dB<<endl;
	cout<<"Povrsina =<<dA*dB<<endl;
	        <<"Obim ="<<((double)2)*dA*dB<<endl;
	        <<"Dijagonala ="<<sqrt(pow(dA,2)+pow(dB,2)<<endl;

	system("PAUSE");
	return EXIT_SUCCESS;
}	  

#include <iostream>
#include <cmath>
using namespace std;

class CPravougaonik
{
private:
	     double dA, dB;
public:
	CPravougaonik( double a=1, double b=1){dA=a; dB=b;}
	~CPravougaonik(){}

	double StranicaA(void) { return dA;}
	double StranicaB(void) { return dB;}

	double Povrsina(void)  { return dA*dB;}

	double Obim(void)      { return ((double)2)*dA*dB;}

	double Dijagonala(void){ return (sqrt(pow(dA,2)+pow(dB,2)));}
};

int
main(void)
{
	double dStranicaA;
	cout<<"Unesite prvu stranicu pravougaonika->";
	cin>>dStranicaA;

	double dStranicaB;
	cout<<"Unesite drugu stranicu pravougaonika->";
	cin>>dStranicaB;

	CPravougaonik Pravougaonik(dStranicaA, dStranicaB);
	cout<<"Stranice pravougaonika su: \n";
	cout<<"a = "<<Pravougaonik.StranicaA()<<endl;
	cout<<"b = "<<Pravougaonik.StranicaB()<<endl;
	cout<<"Povrsina ="<<Pravougaonik.Povrsina()<<endl;
	cout<<"Obim ="<<Pravougaonik.Obim()<<endl;
	cout<<"Dijgonala ="<<Pravougaonik.Dijagonala()<<endl;

	system("PAUSE");
	return EXIT_SUCCESS;
}