=

28. #include

#include

class ClassA
{
public:
int a;
7

class ClassB : public )

{
public:
int b;
);
class ClassC : public ClassA
{
public:
int 0;
7

class ClassD : public ClassB, public ClassC
{

public:
int d;
ர;
void main()
{

ClassD obj;

obj.a = 10; 11518167601 1, Error occur