Question

I’m working on a project where I have 2 classes: Room and EventRoom
EventRoom inherits from Room and have a few more members.

In my code I do this(tmpPtr is a Room-pointer):

if(eventRoom)
     tmpPtr = dynamic_cast<EventRoom*>(tmpPtr);

and later when I try this:

if(line == "false;")
     tmpPtr->setComplete(false);

I get compilation errors. setComplete is a member of EventRoom

Short version: I want to create objects of type Room, and in some cases EventRoom. The code currently works for Room only, but 90% of the code would be identical for EventRoom. Any way of using the same code? (with dynamic_cast or something similiar)

Answer 1

You need tmpPtr to be an EventRoot pointer.

EventRoom* tmpPtr;

if(eventRoom)
     tmpPtr = dynamic_cast<EventRoom*>(tmpPtr);

You can only call Room public methods on a Room pointer. You cannot call EventRoom-only methods.