The inheritance and access control of ZTE in C + + real problem

#include <iostream> #include <stdio.h>using namespace Std;class test;class Base {protected:  int mltem; Private:   int mCount;   Friend class Test; }; Class Sub:public Base {public:  void Test (const sub& sub,const base& Base)  {    int i=mltem;   (A) i = Sub.mltem;   (B)  i = Base.mltem;  (C)  }}; Class Test {public  :   int Count (const base& Base)  {    return base.mcount;  (D)  }};int Main () {//Your code goes Herereturn 0;}

Resolution

Answer: C

1. Public Succession:

Derived classes can access non-private members of the base class;

Derived class objects can access the public members of the base class;

2. Private inheritance and protection inheritance:

A derived class can access a non-private member of the base class;

Derived class objects are not accessible to all members of the base class;

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The inheritance and access control of ZTE in C + + real problem