// CS 2SC3 / SE 2S03 solution for assignment 6 -- Pouya Larjani
typedef struct {double x,y;} vector;
typedef struct node_record {vector data; struct node_record* next;} * node;
typedef struct vs {int size; node seq;} * vec_store;

extern vector error_vector;
double vec_mag(vector);
vec_store make_vec_store();
vector get_vec(vec_store,int);
void delete_vec(vec_store,int);
void insert_vec(vec_store,vector);
void print_vec_store(vec_store);