#ifndef _VECTOR_
#define _VECTOR_

#include <iostream>
#include <string>
#include <cstdlib>
using namespace std;

double * Add (double *A, double *B);

double * Subtract (double *A, double *B);

double Dot (double *A, double *B);

double * ScaMult (double sca, double *A);

double * Cross (double *A, double *B);

double * Reflect (double *v, double *p1, double *p2, double *p3);

#endif