Go4Expert - calling ctor inside a member function of a class

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Frank Reich

29Nov2006 09:39

calling ctor inside a member function of a class

Hello. May I ask a question to the ctor in this program.

main.cpp:

Code:

#include <iostream>

#include "cTest.h"



int main()

{ 

        cTest i;



        i.SetA(5);



        i.ClearA();



        return 0;

}

cTest.h:

Code:

#pragma once



class cTest

{

public:

        cTest(void)

        {itsA = 0;}

        ~cTest(void){}

        void SetA (int i)

        {itsA = i;}

        void ClearA ()

        {cTest();}

private:

        int itsA;

};

I am wondering, why the value of 'itsA' is not '0' after 'i.ClearA();' was called in main.cpp.

Thanks.
F.R.

shabbir

29Nov2006 10:28

Re: calling ctor inside a member function of a class

Its because when you are calling a constructor its creating a new object and assigning the value 0 and as the object goes out of scope its destroyed and so the object in the main does not reflect zero.

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