Linking problem - "undefined reference"

Just to add:

Your SimpleClass base class will need a virtual destructor if you plan on doing something like this:

Code:

---

// Test.cpp

int main(int argc, char* argv[])
{
  // complains about this ?!
  SimpleClass *notworking = new DerivedSimpleClass();
  cout<<notworking->getContent();
  delete notworking; // undefined behavior
}

---

If SimpleClass does not have a virtual destructor, and you are destroying the object through a pointer to base, the behavior is undefined.

Regards,

Paul McKenzie