primjer sa predavanja 9b

#include <iostream>
#include <string>
#include <cmath>

class Vektor3d
{
    double x,y,z;
public:
   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 );
    }
    void pomnoziSaSkalarom(double s)
    {
        x*=s;
        y*=s;
        z*=s;
    }
    void SaberiSa (const Vektor3d &v)
    {
        x+=v.x;
        y+=v.y;
        z+=v.z;
    }

};


int main()
{
    Vektor3d v1, v2;
    v1.Postavi (3, 4, 5);
    v2.Postavi(7, 3, 2);
    std::cout<< v1.DajDuzinu() << std::endl;
    v1.pomnoziSaSkalarom(5);
    v1.Ispisi();
    std::cout<<std::endl;
    v1.SaberiSa(v2);
    v1.Ispisi();
    return 0;
}