tut12-zad1

#include <iostream>
#include <stdexcept>
#include <cstring>
#include <cmath>
#include <vector>
#include "TestCurenja.h"

using namespace std;

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 PostaviX(double x) {Vektor3d::x=x; }
     void PostaviY(double y) {Vektor3d::y=y; }
      void PostaviZ(double z) {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;
    }

    double DajX() const {return x;}
     double DajY() const {return y;}
      double DajZ() const {return z;}
      double DajDuzinu() const {return sqrt(x*x+y*y+z*z); }

     friend  ostream &operator <<(ostream &tok, const Vektor3d &v) {
      tok<<"{"<<v.x<<","<<v.y<<","<<v.z<<"}";
      return tok;
      }

     friend Vektor3d &operator*= (Vektor3d &v1, int a) {
     v1.x*=a; v1.y*=a; v1.z*=a;
     return v1;
     }

     friend Vektor3d &operator+=(Vektor3d &v1, const Vektor3d v2) {
         v1.x+=v2.x; v1.y+=v2.y; v1.z+=v2.z;
         return v1;
     }
};

    int main () {
    Vektor3d v1, v2;
   v1.Postavi(3,4,5);
   v2.Postavi(2,1,1);
    cout<<"Duzina prvog vektora: "<<v1.DajDuzinu()<<endl;
    cout<<"Duzina drugog vektora: "<<v2.DajDuzinu()<<endl;
    v1+=v2;
    cout<<v1;
    cout<<endl;
    v2*=3;
  cout<<v2;
    return 0;
    }