// structure
            typedef struct coordinates{
                double **a;
            } coord;

            // counts the nmbr of points
            int count(){
                int i;
                int a1, a2, a3;
                FILE *fp;
                fp = fopen("abc.txt", "r+");
                while (fscanf(fp, "%d %d %d", &a1, &a2, &a3) != EOF){
                    i++;
                    if (feof(fp)){
                        break;
                    }
                }
                fclose(fp);
                return(i);
            }

            // creates new structure with the right size of memory allocated
            coord *newVector(size_t s){
                coord *v;
                int j;
                v = malloc(sizeof(coord));

                v->a = malloc(sizeof(double*)*3);

                for (j=0; j<3; j++){
                    v->a[j] = malloc(sizeof(double)*s);
                }

            }

            void get_coords(coord *points){
                int i=0;
                FILE *fp;
                fp = fopen("abc.txt", "r+");
                while (fscanf(fp, "%le %le %le", &points->a[i][0], &points->a[i][1], &points->a[i][2]) != EOF){
                    i++;
                }
                fclose(fp);
            }


            int main(){
                int i = 0, j=0;

                coord *points;

                i = count();

                points = newVector(i);

                get_coords(points);

                for (i=0; i<3; i++){
                        printf("%lf %lf %lfn", points->a[i][0], points->a[i][1], points->a[i][2]);
                }
            }

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