int main() {
double x, y;
printf("Enter coordinates of point A: ");
scanf("%lf %lf", &x, &y);
Point* a = make_point(x, y);
printf("Enter coordinates of point B: ");
scanf("%lf %lf", &x, &y);
Point* b = make_point(x, y);
Point* c = compute_mid(a, b);
print_point(c);
destroy_point(a);
destroy_point(b);
destroy_point(c);
return 0;
}
// free the memory for stroke object including its children objects such as points
PtrStroke destroy_stroke (PtrStroke stroke)
{
PtrInkPoint point = NULL;
PtrStroke nextStroke = NULL;
if (stroke == NULL)
return NULL;
nextStroke = stroke->nextStroke;
point = stroke->firstPoint;
while (point)
point = destroy_point (point);
SB_INKPRINTF("return(%p)\n", stroke);
free (stroke);
return nextStroke;
}