#include "vector.h"


vector* make_vector(float a, float b) {
  vector *v = malloc(sizeof(vector));
  v->a = a;
  v->b = b;
  return v;
}

float x_coordinate(vector *v) {
  return v->a;
}

float y_coordinate(vector *v) {
  return v->b;
}

vector* mul(vector *v, float r) {
  v->a=v->a*r;
  v->b=v->b*r;
  return v;
}

vector* sum(vector *v, float a, float b) {
  v->a = v->a + a;
  v->b = v->b + b;
  return v;
}