trougao

#ifndef TROUGAO_HPP_INCLUDED
#define TROUGAO_HPP_INCLUDED
#include <math.h>
#include <iostream>
using namespace std;

class Trougao {
    private:
        double a;
        double b;
        double c;
    public:
        Trougao() {a=3;b=4;c=5;}

        void setA(double aa) {a=aa;}
        void setB(double bb) {b=bb;}
        void setC(double cc) {c=cc;}

        double getA() const {return a;}
        double getB() const {return b;}
        double getC() const {return c;}
        double getO() const;
        double getP() const;
};

#endif // TROUGAO_HPP_INCLUDED
-------------------------------
#ifndef TROUGAO_CPP_INCLUDED
#define TROUGAO_CPP_INCLUDED
#include "trougao.hpp"

double Trougao::getO() const {
    return a+b+c;
}
double Trougao::getP() const {
    double s=(a+b+c)/2;
    return sqrt(s*(s-a)*(s-b)*(s-c));
}

#endif // TROUGAO_CPP_INCLUDED
-------------------------------
#include "trougao.hpp"
int main() {
    Trougao t;
    cout<<"Duzina stranice a:"<<t.getA()<<endl;
    cout<<"Duzina stranice b:"<<t.getB()<<endl;
    cout<<"Duzina stranice c:"<<t.getC()<<endl;
    cout<<"Obim:"<<t.getO()<<endl;
    cout<<"Povrsina:"<<t.getP()<<endl;
    return 0;
    }