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How to interact between 2 classes

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[color=#1C2837][size=2]Hi all,

[color=#1C2837][size=2]I have a class, say A and another class B.

[color=#1C2837][size=2]In class A, I have a method C. inside this method, I will call method D from B
[color=#1C2837][size=2]ie: A::C()

[color=#1C2837][size=2] b.D(A* a) // b is intance of B

[color=#1C2837][size=2]But as you see, the method D need a parameter which is a pointer of class A

[color=#1C2837][size=2]How can I do that?

[color=#1C2837][size=2]The header files sequence cannot provide me this way to program!

[color=#1C2837][size=2]Thanks all,

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Sorry...May be my expression is not good enough...

ok I have 2 classes, one is called A and another is called B.
I have 2 pairs of header and cpp files, A.h, A.cpp, B.h, B.cpp

In class A, I have a method C. Within the method C, I call method D which declare in class B

void A::C(B* b)

which means that C() need to pass a pointer of B and D() need to pass a pointer of A.

The question is, how can I do that?
Because I cannot compile my code since the header file cannot recognize the classes.

eg: If I include A.h first in B.cpp, A.h cannot recognize the class B and vice [font=arial, sans-serif][size=2]versa[/font].


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