How to access member of a class from a diff class

[cheeranjiv]

Hi ,
I am a beginner in C++.
I want to know how can we access data member of a class from another class. I am facing problem in visualizing the things in writing separate .h and .cpp file.
Here I explain the things.We have three classes.
In a.cpp (assuming the a.h files is wriiten )

#include "a.h"<br /> A::A()<br /> {<br /> int ii=1;<br /> }<br /> void A:: fun_a()<br /> {<br /> cout<<"Value in A:"<<ii<<endl;<br /> }<br />

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#include "a.h"<br /> A::A()<br /> {<br /> int ii=1;<br /> }<br /> void  A:: fun_a()<br /> {<br /> cout<<"Value in A:"<<ii<<endl;<br /> }<br />

In b.h

#include "a.h"<br /> Class B<br /> {<br /> <br /> int jj;<br /> A b_aa;<br /> public:<br /> <br /> void fun_b();<br /> void change_ii();<br /> <br /> };<br />

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#include "a.h"<br /> Class B<br /> {<br /> <br /> int jj;<br /> A b_aa;<br /> public:<br /> <br /> void fun_b();<br /> void change_ii();<br /> <br /> };<br />

In b.cpp

#include "b.h"<br /> B::B()<br /> {<br /> jj=2;<br /> }<br /> <br /> void B::fun_b()<br /> {<br /> cout<<"value in A:" << ii <<"value in B:" <<jj;<br /> }<br /> void B::change_ii()<br /> {<br /> ii=5;<br /> }<br /> <br /> // suppose both the functions are called and the value of ii is 5 and jj is 2<br /> //Now I want to access the data ii from and jj from the C class.<br /> //I want to assign kk a member of C class or a simple variable the value of ii (i.e. 5).<br /> <br />

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#include "b.h"<br /> B::B()<br /> {<br /> jj=2;<br /> }<br /> <br /> void B::fun_b()<br /> {<br /> cout<<"value in A:" << ii <<"value in B:" <<jj;<br /> }<br /> void B::change_ii()<br /> {<br /> ii=5;<br /> }<br /> <br /> // suppose both the functions are called and the value of ii is 5 and jj is 2<br /> //Now I want to access the data ii from and jj from the C class.<br /> //I want to assign kk a member of C class or a simple variable the value of ii (i.e. 5).<br /> <br />

How to go about it ?
If declare a member of type B in our C class..it will carete another instance of B but does not contains the data in the live B object.
Is passing a reference to the B class in the contructor of C class is asolution? If so, whow to do that. I am getting confused in implementin this concept.
And what other ways are there?

Thanks and regards,
Alex

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