C1126: Abstract class cause inheriting pure virtual without overriding function(s)

  class A{

  

  public:

  

    virtual void f(void) = 0;

  

    virtual void g(void) = 0;

  

  };

  

  class B : public A{

  

  public:

  

    void f(void){}

  

    // void B::g(void) is inherited pure virtual 

  

    // ==> B is an implicit abstract class

  

  };