problem with visual C++ 9 compile

[nabil035]

Well the problem is so frustrating for a any C++ developer


I want to import call using this syntax


#include.....
class Imported;

class NEWclass
{
Imported* imp;
}

the compiler considers "class Imported " as a new definition for the class Imported.
Can anyone show me a way to import the class without calling the header file.

thx.

[weaknessforcats]

What you are showing is called a forward reference. It's like a prototype for a class. It tells the compiler that Imported is a class even though the compiler hasn't yet seen the class declaration. This is enough info for the compiler to allow an Imported* without generating an error.
[code=cpp]
class Imported; //forward reference

int main()
{
Imported* ptr; //OK
}
[/code

However, if you use this pointer with say ptr->GetData(), then you will need to include the class declaration so the compiler can verify that there is an Imported::GetData().

[RRick]

Since your compiler is complaining that this is a redefinition of Imported, it sounds like the Imported header file is already included. Has some other header file included this object?

Have you tried removing the forward declaration of Imported and see what happens?

[nabil035]

thx


Yes,it was a problem of includes,