t be equally spaced. The integration returns the number of steps that were
        applied and updates x which is set to the approximate solution of the ODE
        at the end of integration.
      </p>
<p>
        It is also possible to represent the ode system as a class. The rhs must
        then be implemented as a functor - a class with an overloaded function call
        operator:
      </p>
<p>
</p>
<pre class="programlisting"><span class="comment">/* The rhs of x' = f(x) defined as a class */</span>