Can't understand the syntax c++

[turtail]

I have a problem to understand the following code. Can anybody please help me to understand it.

indication = MediumIndication::IDLE;
catIndication = bb->subscribe(this, mi, getParentModule()->getId());

catRadioState = bb->subscribe(this, cs, getParentModule()->getId());

catDroppedPacket = bb->getCategory(droppedPacket);

Specially, in this "bb->subscribe(this, mi, getParentModule()->getId());" part.

Here 'MediumIndication', is a Class, 'mi', 'cs' are object of a class, 'subcribe' is a function, 'getParentModule()', 'getId()' are functions. droppedPacket is also an object of a class. 'bb' is a pointer to a class. I hope it is now clear to you.

Thanks in advance.

[Ancient Dragon]

You said it yourself: Here 'MediumIndication', is a Class, 'mi', 'cs' are object of a class, 'subcribe' is a function, 'getParentModule()', 'getId()' are functions. droppedPacket is also an object of a class. 'bb' is a pointer to a class. I hope it is now clear to you.

What more do you expect from us??

[turtail]

You said it yourself: Here 'MediumIndication', is a Class, 'mi', 'cs' are object of a class, 'subcribe' is a function, 'getParentModule()', 'getId()' are functions. droppedPacket is also an object of a class. 'bb' is a pointer to a class. I hope it is now clear to you.

What more do you expect from us??

ok, specifically I didn't understand the following line:
bb->subscribe(this, &mi, getParentModule()->getId())

here what 'bb' tries to do with 'subscribe', though they are not defined in the same class.

[Ancient Dragon]

you will have to look at the class declarations to find out how subscribe is declared. If its not in the same class as bb then it must be in one of bb's ancestors.