member variables

Is there a way to allow a member variable to be read and written to by its own class but read by all others
jgreavesAsked:
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jkrConnect With a Mentor Commented:
Yes and no - you cannot set members to 'read only', but make them 'private' to your class and offer access methods, e.g.

class C {

public:
 C () {};
 ~C () {};

 int GetValue () const { return value;}

private:

 int value;
};
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jgreavesAuthor Commented:
Makes sense

Thanks,

jkr
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jkrCommented:
Hmm, so could we move this one to the PAQ section or is there anything else you need to know? :o)
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AxterCommented:
Another method would be to add a public constant reference to a private member variable.
Example:
class C {
public:
C ()xxvalue(m_xxvalue) {};
const int &xxvalue;
private:
int m_xxvalue;
};

Now any out side class can access xxvalue, but it can't modify it.
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AxterCommented:
Correction:
class C {
public:
C () : xxvalue(m_xxvalue) {};
const int &xxvalue;
private:
int m_xxvalue;
};
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GuruVBCommented:
Yes In VB u can do that,

Make a friend Let property and make public Get property. Doing this u can  modify the property (Member variable) which is friend and the others can read this property (member varable)

e.g.

Friend Property Let ErrorMsg(sMsg As String)
    ' Keep the value im mem
    msErrorMsg = sMsg
End Property

Public Property Get ErrorMsg() As String
    ErrorMsg = msErrorMsg
End Property

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llapCommented:
Another alternative you might find useful is to use
static public members that are initialized by static
functions.
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griesshCommented:
Dear jgreaves

I think you forgot this question. I will ask Community Support to close it unless you finalize it within 7 days. You can always request to keep this question open. But remember, experts can only help you if you provide feedback to their questions.
Unless there is objection or further activity,  I will suggest to accept

     "jkr"

comment(s) as an answer.

PLEASE DO NOT ACCEPT THIS COMMENT AS AN ANSWER!
======
Werner
0
 
MindphaserCommented:
Force accepted

** Mindphaser - Community Support Moderator **
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