What will the program output and which C++ mechanism causes this result?What will the program output and which C++ mechanism causes this result? #include class A { public : virtual void Foo() { std::cout

Question

What will the program output and which C++ mechanism causes this result?What will the program output and which C++ mechanism causes this result? 
 #include <iostream>   class   A { public :      virtual   void   Foo() { std::cout <<  "A" ; } };   class   B :  public   A { public :      void   Foo() override { std::cout <<  "B" ; } };   int   main() {      B b;      A a = b;   // !      a.Foo(); }

Answer

Won't compile - cannot assign B to A

Answer

"A" - object slicing occurs, the B-part is cut off, virtual dispatch does not work through value

Answer

"B" - virtual dispatch works through value too

Answer

"AB" - first the A-part is copied, then B::Foo is called

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What will the program output and which C++ mechanism causes this result?What wi...

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