language: C++ 4.7.2 (gcc-4.7.2)
date: 424 days 4 hours ago
link:
visibility: public 
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#include <iostream>
 
using namespace std;
 
class base
{
   friend class derived; //<======= note this line
   private:
      base()
      {
         cout << "base: ctor()\n";
      }
};
 
class derived: public base
{
   public:
      derived()
      {
         cout << "derived: ctor()\n";
      }
};
 
int main()
{
   derived d;
}