ode>int *</code> argument
    and <code>void</code> return type.
  </p>
  <p>
    <code>void (*x())(int *)</code><br>
    A function that returns a pointer to a function that has <code>int
    *</code> argument and <code>void</code> return type.
  </p>
  <p>
    <code>void (*x(void (*)(int *)))(int *)</code><br>
    A function that has a pointer to a function that has <code>int
    *</code> argument and <code>void</code> return type as argument,
    and returns a pointer to a function which has <code>int *<