pointer-to-pointer of derived class in multiple inheritance
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by Abdul jalil
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Published on 2010-06-18T10:08:37Z
Indexed on
2010/06/18
10:13 UTC
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i have 3 classes A,B and C. C is derived from A and B. i get pointer to pointer of class C and cast to A** , and B ** , the variable that hold the the B** has the address of A** in my example B ** BdoublePtr hold the address of A** .i am using the following code
#include "conio.h"
#include "stdio.h"
#include "string.h"
class A{
public:
A()
{
strA=new char[30];
strcpy(strA,"class A");
}
char *strA;
};
class B
{
public:
B()
{
strB=new char[30];
strcpy(strB,"class B");
}
char *strB;
};
class C :public A, public B
{
public:
C()
{
strC=new char[30];
strcpy(strC,"class C");
}
char *strC;
};
int main(void)
{
C* ptrC=new C();
A * Aptr=(A*)ptrC;
printf("\n class A value : %s",Aptr->strA);
B * Bptr=(B*)ptrC;
printf("\n class B value :%s",Bptr->strB);
printf("\n\nnow with double pointer ");
A ** AdoublePtr=(A **)&ptrC;
Aptr=AdoublePtr;
printf("\n class A value : %s",Aptr->strA);
B * BdoublePtr=(B **)&ptrC;
Bptr=*BdoublePtr;
printf("\n class B value : %s",Bptr->strB);
getch();
return 0;
}
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