Figures/Triangle.h

#include "Figure.h"

class Triangle: public Figure
{
    private:
    double x1, y1, x2, y2, x3, y3;

    template <typename T>
    void init(T X1, T Y1, T X2, T Y2, T X3, T Y3)
    {
        x1 = double(X1);
        y1 = double(Y1);
        x2 = double(X2);
        y2 = double(Y2);
        x3 = double(X3);
        y3 = double(Y3);
    }

    public:
    template <typename T>
    Triangle(T X1, T Y1, T X2, T Y2, T X3, T Y3)
    {
        init(X1, Y1, X2, Y2, X3, Y3);
    }
    Triangle(struct Point f, struct Point s, struct Point t);

    double calc_area();
    double calc_perimiter();
    void name();
};