include iostream using namespace std class points private double publi

#include <iostream>

using namespace std;

class points{
private:
	double x, y, z;
public:
	points(double x1, double y1, double z1){
		x = x1;
		y = y1;
		z = z1;
	}
	double getX(){
		return x;
	}
	double getY(){
		return y;
	}
	double getZ(){
		return z;
	}
}

class treug{
private:
	double a, b, c;
public:
	double length(points q, points w){
		return sqrt((w.getX()-q.getX())*(w.getX()-q.getX())+(w.getY()-q.getY())*(w.getY()-q.getY())+(w.getZ()-q.getZ())*(w.getZ()-q.getZ()));
	}
	treug(points q, points w, points e){
		a = length(q, w);
		b = length(e, w);
		c = length(q, e);
	}
}

class paramtr : public treug{
private:
	double p, s;
public:
	paramtr(points q, points w, points e) :treug(q, w, e) {
		p = (a + b + c) / 2;
	}
}
int main(){

}