12th weeks program reading-Multi-inheritance 3, 12th weeks read inheritance

12th weeks program reading-Multi-inheritance 3, 12th weeks read inheritance

# Include <iostream> using namespace std; class Base {public: Base (char I) {cout <"Base constructor. -- "<I <endl ;}; class Derived1: virtual public Base {public: Derived1 (char I, char j): Base (I) {cout <"Derived1 constructor. -- "<j <endl ;}; class Derived2: virtual public Base {public: Derived2 (char I, char j): Base (I) {cout <"Derived2 constructor. -- "<j <endl ;}; class MyDerived: public Derived1, public Derived2 {public: MyDerived (char I, char j, char k, char l, char m, char n, char x): Derived2 (I, j), Derived1 (k, l), Base (m), d (n) {cout <"MyDerived constructor. -- "<x <endl;} private: Base d ;}; int main () {MyDerived obj ('A', 'B', 'C ', 'D', 'E', 'F', 'G'); return 0 ;}

Running result:

What is the proximity principle for B and D output?