Compiler Error C2504
Visual Studio .NET 2003
'class' : base class undefined
The base class is declared but never defined.
Possible cause
- Missing include file.
- External base class not declared with extern.
The following sample generates C2504:
// C2504.cpp
class A;
class B : public A
{ // C2504, define A before using it as a base class
};
int main()
{
}
