#include <iostream>
using namespace std;

// declaration
class vector {
    private:
        float x,y,z;

    public:
        vector(float a=0, float b=0, float c=0) {
            x=a;
            y=b;
            z=c;
        }// vector()
        ~vector() {} // nothing to do :)
        void prtVec();
        void getVec(float &a, float &b, float &c) {
            a=x;
            b=y;
            c=z;
        }// getVec()
};// class vector

// definitions
void vector::prtVec() {
    cout << x << ", " << y << ", " << z << endl;
}// prtVec()

vector operator+(vector& a, vector& b) {
    float x0,y0,z0,x1,y1,z1;

    a.getVec(x0,y0,z0);
    b.getVec(x1,y1,z1);

    return vector(x0+x1,y0+y1,z0+z1);
}// operator+()

int main()
{
    vector v(1,2,3); // constructed with 0,0,0

    vector *vecPtr = &v; // ptr to v

    v.prtVec();
    (*vecPtr).prtVec(); // less common syntax
    vecPtr->prtVec(); // more common syntax

    float x,y,z;
    vecPtr->getVec(x,y,z); // 'pointer to member' syntax again
    cout << x << " " << y << " " << z << endl;



    return 0;
}// main()