Sure. Say the base class constructor takes some parameters. It may check those parameters against certain limits before applying them. If the parameters are outside those limits, it may modify them.
As in the example I posted, the derived class constructor takes parameters that it passes to the base class constructor as well as parameters it uses itself.
Suppose by nature of the derived class’s operation it wants stricter limits applied to the former parameter set before they’re passed to the base class constructor. Maybe those limits are even functions of the latter set of parameters.
To do this extra limiting, the derived class construct would need to perform some operations (i.e. code) and then pass the modified (limited) parameters to the base class constructor.
Hope I’ve expressed myself clearly. I’ll try to come up with a more concrete example.