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



class GeoIznimka : public exception{
	private:
		char* msg;
		double a;
		double b;
		double c;

	public:
		void set_a(double x){
		a = x;
	}
	void set_b(double x){
		b = x;
	}
	void set_c(double x){
		c = x;
	}
	double get_a(){
		return a;
	}
	double get_b(){
		return b;
	}
	double get_c(){
		return c;
	}
		GeoIznimka(char* txt):msg(txt){}
		virtual const char* what() const throw(){
			return msg;
		}
};


 class Trokut{
	protected:
	double a;
	double b;
	double c;
	public:
		Trokut():a(1),b(1),c(1){}
		Trokut(double x,double y,double z):a(x),b(y),c(z){}
		double povrsina(){
			double s = (a+b+c)/2;
			return sqrt(s*(s-a)*(s-b)*(s-c));
		}
		double opseg(){
			return a+b+c;
		}
	bool is_it_trokut(){
		if(a+b > c && a+c>b && b+c>a){
			return true;
		}
		else{
			GeoIznimka A("Nije moguce konsturirat objek s stranicama");
			A.set_a(a);
			A.set_b(b);
			A.set_c(c);
			throw A;
		}
}

};

int main(){

	try{
	Trokut A;
	Trokut B(4,1,1);
		A.is_it_trokut();
		B.is_it_trokut();

	cout<<A.opseg()<<endl;
	cout<<B.opseg()<<endl;
	if(A.povrsina() > B.povrsina()){
		cout << "A ima vecu povrsinu!"<<endl;
	}
	else if(A.povrsina() < B.povrsina()){
		cout << "B ima vecu povrsinu!"<<endl;
	}
	else{
		cout<<"Povrsine su iste" <<endl;
	}
}

catch(GeoIznimka &iznimka){
	cout <<	iznimka.what() << " a:" << iznimka.get_a() <<" b:"<< iznimka.get_b() <<" c:"<< iznimka.get_c()  <<endl;
	}
	return 0;
}