#include <iostream>
#include <cmath>
class Vektor3d
{
    double x, y, z;
    public:
        Vektor3d () {x=0; y=0; z=0;}
        Vektor3d (double x, double y, double z) {Vektor3d::x = x; Vektor3d::y = y; Vektor3d::z = z;}
        void Postavi(double x, double y, double z) {Vektor3d::x = x; Vektor3d::y = y; Vektor3d::z = z;}
        void Ocitaj(double &x, double&y, double&z) const{x = Vektor3d::x; y = Vektor3d::y; z = Vektor3d::z;}
        void Ispisi()const
        {
            std::cout << "{" << x << "," << y << "," << z << "}";
        }
        double DajX()const{return x; }
        double DajY()const{ return y; }
        double DajZ()const{return z; }
        double DajDuzinu() const
        {   return  std::sqrt(x * x + y * y + z * z); }
        Vektor3d &operator+=(const Vektor3d &v2)
        {
            x+=v2.x; y+=v2.y; z+=v2.z;
            return *this;
        }
        Vektor3d &operator*=(double a){x*=a; y*=a; z*=a; return *this;}
        friend std::ostream &operator<<(std::ostream &tok, const Vektor3d &v1);
        friend Vektor3d operator +(const Vektor3d&v1, const Vektor3d&v2);
};
Vektor3d operator+(const Vektor3d&v1, const Vektor3d&v2)
{
    return Vektor3d(v1.x+v2.x, v1.y+v2.y, v1.z+v2.z);
}
std::ostream &operator<<(std::ostream &tok, const Vektor3d &v1)
{
    return tok<<"{"<<v1.x<<", "<<v1.y<<", "<<v1.z<<"}";

}
class Sat
{
    int sati, minute, sekunde;
    public:
    void Postavi(int sati,int minute, int sekunde){Sat::sati=sati; Sat::minute=minute; Sat::sekunde=sekunde;}
    int DajSate()const;
    int DajMinute()const;
    int DajSekunde()const;
    void Ispisi()const;
    friend void promjena(Sat &s1, int);
    Sat &operator+=(int broj)
    {
        promjena(*this, broj);

    }
    friend std::ostream &operator<<(std::ostream &tok, const Sat &s1);
    friend Sat &operator++(Sat &s1);
    friend Sat operator++(Sat &s1, int);

};
void promjena(Sat &s1, int broj)
{
    s1.sekunde+=broj;
    if(broj>=0)
        {
        if(s1.sekunde>=60) {s1.minute+=s1.sekunde/60; s1.sekunde=s1.sekunde%60;}
        if(s1.minute>=60)  {s1.sati+=s1.minute/60; s1.minute%=60;}
        if(s1.sati>=24) {s1.sati%=24;}}
        else
        {
            if(s1.sekunde<0) {s1.minute+=s1.sekunde/60; s1.sekunde=60+s1.sekunde%60;}
            if(s1.minute<0) {s1.sati+=s1.minute/60; s1.minute=60+s1.minute%60;}
            if(s1.sati <0) {s1.sati=24+s1.sati%24;}
        }
}
Sat &operator++(Sat &s1)
    {
        promjena(s1, 1);
        return s1;
    }
Sat operator++ (Sat &s1, int)
    {
        Sat pomocni(s1);
        promjena(pomocni, 1);
        return pomocni;
    }
std::ostream &operator<<(std::ostream &tok, const Sat &s1)
{
    return tok<<s1.sati<<"h "<<s1.minute<<"min "<<s1.sekunde<<"sec.";
}
int main()
{
    Vektor3d a,b;
    a.Postavi(3,5,7);
    b.Postavi(1,1,1);
    a*=3;
    std::cout<<a<<" "<<b;
    Sat s;
    s.Postavi(22,40,15);
    s+=3600;
    std::cout<<" "<<s;
    return 0;
}