私有扩展后,C++将变量公开为变量

Question

标题是:

课程如下:

class A
{
public:
    int a;
    int b;
    int c;

    function1();
    function2();
}

和B类扩展A,如何将A中的所有变量公开？

class B : private A
{
public:
    int a; //How to turn this public from A
    int b; //How to turn this public from A
    int c; //How to turn this public from A
}

Answer 1

将公共数据和私有基类的成员公开为派生类中的公共数据是一个坏主意.但是,如果必须,您可以使用:

class B : private A
{
   public:
      using A::a;
      using A::b;
      using A::c;
};