C++public继承其成员(private,protected,public)调用关系

#include<iostream>  
using namespace std;  

class Base
{
private:
    int i;
protected:
    int j;
public:
    int k;
};
class Child:public Base//对public继承
{
public:
    void func()
    {
        //i;//从继承的角度说:子类不可访问父类的private成员
        j;
        k;
    }
};
int main(int argc,char *argv[])
{
    Child child;
    child.func();
    child.k;//可访问public
    Base a;//从调用的角度说,只可以访问其public成员
    //a.i;
    //a.j;
    a.k;
}