klasa_otpornik

//otpornik.hpp


#ifndef OTPORNIK_DEF
#define OTPORNIK_DEF
#include <iostream>
using namespace std;

class Otpornik{
    private:
        double r;
    public:
        Otpornik();
        Otpornik(double);
        Otpornik(const Otpornik&);
        void setR(double);
        double getR()const;
       Otpornik& operator=(const Otpornik&);
       friend Otpornik operator+(const Otpornik&, const Otpornik&);
       friend Otpornik operator||(const Otpornik&, const Otpornik&);
       friend ostream& operator<<(ostream&, const Otpornik&);
       friend istream& operator>>(istream&, Otpornik&);



};
#endif

//otpornik.cpp



#include "otpornik.hpp"

Otpornik:: Otpornik() {r = 0;}
Otpornik:: Otpornik(double rr) {r = rr;}
Otpornik:: Otpornik(const Otpornik &x){r = x.r;}
void Otpornik:: setR(double rr){r = rr;}
double Otpornik::getR()const{return r;}
Otpornik& Otpornik::operator=(const Otpornik &x){r = x.r;}

Otpornik operator+(const Otpornik &x, const Otpornik &y){
    Otpornik z( x.r + y.r);
    return z;
    }
Otpornik operator||(const Otpornik &x, const Otpornik&y){
    Otpornik z((x.r * y.r)/ (x.r+y.r)) ;
    return z;
}
ostream& operator<<(ostream &out, const Otpornik &x){
    out<<x.r;
    return out;
}

istream& operator>>(istream &in, Otpornik &x){
    in>>x.r;
    return in;
}

//main.cpp


#include "otpornik.hpp"

int main(){

    Otpornik r1,r2;
    cout<<"r1,r2?"<<endl;
    cin>>r1;
    cin>>r2;

    cout<<"serijska veza:"<<(r1+r2)<<endl;
    cout<<"paralelna veza:"<<(r1||r2)<<endl;
    r1=r2;
    cout<<r1<<"="<<r2;

    return 0;
    }