How to do this in c++

Question

I have two classes A and B
A has a member function f that receive an object of B
B also have a member function g that receive an object of A
how can I do this I got error: B hasn't been declared
the code
https://code.sololearn.com/caq8A8QBbW9s/?ref=app

Answer 1

you are legend ~ swim ~ thank you very much

Answer 2

You are the best men I like you

Answer 3

*** I didn't see your answer I am sorry you have preceded

Answer 4

*** I tried it , id didn't work on codeblocks

Answer 5

the same error I got here check the code now please

Answer 6

yes exactly

Answer 7

~ swim ~
Coder Kitten
check that I could do what I want without reference by defining the function of A after B

Answer 8

Well it's giving error because the classes you define is both different classes and you are defining object of A class in method of class B and vice versa in class class A.
So either declare
class B:public A
Or
Class A: public B
So the methods you define can use object of it's parent class.

Answer 9

You can write both A and B in separeted header file and include A in B and B in A

Answer 10

There is no output

Answer 11

.

Answer 12

هلل

Answer 13

Fyu