using CArray object in CArray

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hi, i have a problem to use CArray object in CArray

C#

// .h file
class ArrClass : public CArray<int, int>
{
public:
    int m_id;
    void Func1(){ m_id = 1;};
};

// .cpp file
void CTestDlg::OnBnClickedButton1()
{
	ArrClass arr1;
	CArray<ArrClass, ArrClass> arr2;
	arr2.Add(arr1);     // error !!!! 
}

this error is:

VB

error C2248: 'CObject::CObject' : cannot access private member declared in class 'CObject'

how do i resolve it? please help me!

Posted 27-Jul-14 0:37am

Zon-cpp

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Zon-cpp · Answer 1 · 2014-07-28T01:59:00

because CArray requires its element type to be copyable, i should define “copy constructor” and “assignment operator” functions for "ArrClass" class.

class ArrClass : public CArray<int,>
{
public:
    int m_id;

    ArrClass(){};
    ArrClass(const ArrClass& obj){m_id = obj.m_id;};    // copy constructor
    void Func1(){ m_id = 1;};
    ArrClass operator=(const ArrClass& obj) // assignment operator
    {
        m_id = obj.m_id;
        return *this;
    };
};

the error resolved.

Zon-cpp · Answer 2 · 2014-08-04T19:14:00

I think this code is ok.

C++

ArrClass(const ArrClass& obj)   // copy constructor
    {
        Copy(obj);

        m_id = obj.m_id;
    };  

ArrClass operator=(const ArrClass& obj) // assignment operator
    {
        Copy(obj);

        m_id = obj.m_id;
        return *this;
    };

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using CArray object in CArray

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