在C++中，选择从哪个类中获取成员

Question

请考虑以下代码：

class A {
  public:
  virtual void f() {
    std::cout << "A-F" << std::endl;
  }

  virtual void g() {
    std::cout << "A-G" << std::endl;
  }
};

class B: public A {
  public:
  void f() {
    std::cout << "B-F" << std::endl;
  }
};

class C: public A {
  public:
  void g() {
    std::cout << "C-G" << std::endl;
  }
};

现在我要定义一个类C，它的成员f是类B，成员g来自类a，类似于这样：

class D: public B, public C {
  public:
  \\ Inheritate f from B

  \\ Inheritate g from C
};

我如何在C++中做到这一点？

Answer 1

#include <iostream>

using namespace std;

class A {
  public:
  virtual void f() {
    std::cout << "A-F" << std::endl;
  }

  void g() {
    std::cout << "A-G" << std::endl;
  }
};

class B: public A {
  public:
  void f() {
    std::cout << "B-F" << std::endl;
  }
};

class C: public B{
  
};

int main()
{
   C c;
   c.f();
   c.g();
   return 0;
}