CPlusPlusClasses/geometry/Triangle.h

#pragma once
#include "geometry.h"

class Triangle_exception{};
class Triangle :
	public Geometry_figure
{
private:
	double sides[3];
	void calc_sides();
	
public:
	template <class value_class> Triangle(value_class A, value_class B, value_class C);
	template <class value_class> Triangle(value_class x1, value_class y1, value_class x2, value_class y2, value_class x3, value_class y3 );
	Triangle();
	template <>  Triangle(Point  A, Point  B, Point  C);

	double calc_area();
	double calc_perimeter();
	void name();


};

template<class value_class>
inline Triangle::Triangle(value_class A, value_class B, value_class C)
{

	is_incorrect = (A <= 0) || (B <= 0) || (C <= 0);
	sides[0] = (double)(A);
	sides[1] = (double)(B);
	sides[2] = (double)(C);
	is_incorrect = is_incorrect || (sides[0] > sides[1] + sides[2]) || (sides[2] > sides[1] + sides[0]) || (sides[1] > sides[2] + sides[0]);
	if (is_incorrect)
		throw Triangle_exception();

 
}

template<class value_class>
inline Triangle::Triangle(value_class x1, value_class y1, value_class x2, value_class y2, value_class x3, value_class y3)
{
	dots.push_back(Point(x1,y1));
	dots.push_back(Point(x2, y2));
	dots.push_back(Point(x3, y3));
	calc_sides();


}

template <>
Triangle::Triangle(Point A, Point B, Point C)
{
	dots.push_back(A);
	dots.push_back(B);
	dots.push_back(C);
	calc_sides();

}