#ifndef GEOMETRIJA_HPP_INCLUDED
#define GEOMETRIJA_HPP_INCLUDED

#include <cmath>
using namespace std;

class Pravougaonik {
private:
        double a,b;

public:
    Pravougaonik() {
        a = 1;
        b = 1;
    }

    void setA(double aa) {
        a = abs(aa);
    }

    void setB(double bb) {
        b = abs(bb);
    }

    double getA() {
        return a;
    }

    double getB() {
        return b;
    }

    double getPovrsina() const {
        return a * b;
    }

    double getObim() const {
        return ((2*a) + (2*b));
    }

    double getDijagonala() const {
        return sqrt(pow(a,2) + pow(b,2));
    }

};

class Kvadrat {
private:
    double a;

public:
    Kvadrat() {
        a = 1;
    }
    void setA(double aa) {
        a = abs(aa);
    }

    double getA() {
        return a;
    }

    double getPovrsina() const {
        return pow(a,2);
    }

    double getObim() const {
        return 4 * a;
    }

    double getDijagonala() const {
        return a * sqrt(2);
    }

};

class Trougao {
private:
        double a,b,c;

public:
    Trougao() {
        a = 1;
        b = 1;
        c = 1;
    }

    int checkABC(double aa, double bb, double cc) {
        if (aa == 0 || bb == 0 || cc == 0)
            return -1; // Ne moze biti nula...

        else if (aa == bb && bb == cc)
            return 1; // Jednakostranican trougao!

        else if (aa == bb || aa == cc || bb == cc)
            return 2; // Jednakokraki trougao!

        else if (pow(aa,2) + pow(bb,2) == pow(cc,2))
            return 3; // Pravougli trougao!

        else return 4; // Raznostranicni ?
    }


    void setA(double aa) {
        a = abs(aa);
    }

    void setB(double bb) {
        b = abs(bb);
    }

    void setC(double cc) {
        c = abs(cc);
    }

    double getA() {
        return a;
    }

    double getB() {
        return b;
    }

    double getC() {
        return c;
    }

    double getPovrsina() const {
        double s = (a+b+c)/2.f;

        return sqrt(s*(s-a)*(s-b)*(s-c));
    }

    double getObim() const {
        return a+b+c;
    }

};


#endif // GEOMETRIJA_HPP_INCLUDED


// GLAVNI PROGRAM
#include "geometrija.hpp"
#include <iostream>
#include <cstdlib>

using namespace std;

int main()
{
  Pravougaonik p;
  Kvadrat k;
  Trougao t;

  double a = 0,b = 0,c = 0;

do {
  cout << "Unesite stranicu a: " << endl;
  cin >> a;
  cout << "Unesite stranicu b: " << endl;
  cin >> b;
  cout << "Unesite stranicu c: " << endl;
  cin >> c;
}
while ((a == 0) || (b == 0) || (c == 0));

system("cls");

  p.setA(a);
  p.setB(b);

  k.setA(a);

  t.setA(a);
  t.setB(b);
  t.setC(c);

    cout << "-----------PRAVOUGAONIK-----------" << endl;
    cout << "Duzina stranice a: " << p.getA() << ", duzina stranice b: " << p.getB() << endl;
    cout << "Povrsina pravougaonika: " << p.getPovrsina() << endl;
    cout << "Obim pravougaonika: " << p.getObim() << endl;
    cout << "---------------------------------------------" << endl;
    cout << endl;
    cout << "-----------KVADRAT-----------" << endl;
    cout << "Duzina stranice a: " << k.getA() << endl;
    cout << "Povrsina kvadrata: " << k.getPovrsina() << endl;
    cout << "Obim kvadrata: " << k.getObim() << endl;
    cout << "Dijagonala kvadrata: " << k.getDijagonala() << endl;
    cout << "---------------------------------------------" << endl;
    cout << endl;
    cout << "-----------TROUGAO-----------" << endl;
    cout << "Duzina stranice a: " << t.getA() << ", duzina stranice b: " << t.getB() << ", duzina stranice c: " << t.getC() << endl;
    cout << "Povrsina trougla: " << t.getPovrsina() << endl;
    cout << "Obim trouga: " << t.getObim() << endl;
    cout << "Vrsta trouga: ";
    switch (t.checkABC(a,b,c)) {
        case -1:
            cout << "GRESKA! Nepoznat trougao, pogresan unos!" << endl;
        break;

        case 1:
            cout << "Jednakostranican trougao!" << endl;
        break;

        case 2:
            cout << "Jednakokraki trougao!" << endl;
        break;

        case 3:
            cout << "Pravougli trougao!" << endl;
        break;

        default:
            cout << "Raznostranican trougao!" << endl;
        break;
    }
    cout << "---------------------------------------------" << endl;

    return 0;
}