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Program 2
#ifndef TRIPPLE_H
#define TRIPPLE_H

#include "point.h"

class Point;

class Tripple {
    private:
        int x, y, z;

    public:
        Tripple();                   
        Tripple(int xi, int yi, int zi); 
        Tripple(Point p);             

        int getx() const;
        int gety() const;
        int getz() const;

        friend std::ostream& operator<<(std::ostream&, const Tripple&);
};

std::ostream& operator<<(std::ostream&, const Tripple&);

#endif // TRIPPLE_H