class CDB;
class CDM
{
public:
friend CDB& CDB::Add(const CDM&);
CDM& Add(const CDB&);
};
class CDB
{
public:
CDB& Add(const CDM&);
friend CDM& CDM::Add(const CDB&);
};
This code gives me the error : error C2027: use of undefined type 'CDB'. How to resolve this.
No, you can't do that. There is no way to remove the cyclic dependency.
You should be able to get by with making the class CDB
a friend of CDM
instead of wanting to making CDB::Add()
a friend.
class CDB;
class CDM
{
public:
friend class CDB;
CDM& Add(const CDB&);
};
class CDB
{
public:
CDB& Add(const CDM&);
friend CDM& CDM::Add(const CDB&);
};