Notes and errata

• On page 55, lines 3 and 4, we have

  p[0]->x = 3.14; p[0]->y = 2.78;
p[1]->x = 12.1; p[1]->y = -0.3;

  That should be

  p[0].x = 3.14; p[0].y = 2.78;
p[1].x = 12.1; p[1].y = -0.3;

  Thanks to Ian A Taylor for bringing this to my attention.

• On page 58, in the macro that defines free_matrix(), we have

  free_vector(a);
a = NULL;

  The a = NULL is redundant since free_vector() not only frees the memory associated with a, but it also sets a to NULL.

---

Programming Projects in C