text: #include <iostream>
  #include "dthis.h"
  #include "son.h"
  #include "grandma.h"
  
  #include "grandma.cpp"
  #include "son.cpp"
  #include "dthis.cpp"
  
  using namespace std;
  
  int main()
  {
      son so;
      return 0;
  }
  