#include <iostream>
using namespace std;
class People
{
private:
int a;
protected:
int b;
public:
int c;
};
//类的内部检验继承访问权限 继承方式：私有private
/*class Student : private People
{
public:
void show() //内部继承访问
{
//a = 1; //私有 不可以访问
b = 2; //保护 可以被访问
c = 3; //公有 可以被访问
}
};*/
/*class Student : protected People //继承方式：保护protected
{
public:
void show() //内部继承访问
{
//a = 1; //私有 不可以访问
b = 2; //保护 可以被访问
c = 3; //公有 可以被访问
}
};*/
class Student : public People //继承方式:公有public
{
public:
void show() //内部继承访问
{
//a = 1; //私有 不可以访问
b = 2; //保护 可以被访问
c = 3; //公有 可以被访问
}
};
//类的外部访问类的继承权限
int main()
{
//Student s;
/*//s.a = 1; //私有 不可以被访问 外部继承方式：private
//s.b = 2; //保护 不可以被访问
s.c = 3; //公有 不可以被访问*/
/*Student s;
//s.a = 1; //私有 不可以被访问 外部继承方式：protected
//s.b = 2; //保护 不可以被访问
//s.c = 3; //公有 不可以被访问*/
Student s;
//s.a = 1; //私有 不可以被访问 外部继承方式：public
//s.b = 2; //保护 不可以被访问
s.c = 3; //公有 可以被访问
return 0;
}
Summary of
private inheritance:
Internal: the base class private in a derived class can not be accessed by the base class protection, the public in the derived class can be accessed
externally: the base class private, protected, public can not be accessed in a derived class
protected inheritance
inside : base class private in a derived class can not access the protected base class, the public can be accessed in a derived class
outside: the base class private, protected, public can not be accessed in a derived class
public inheritance:
internal: the base class private access to the base class can not be protected, the public can be accessed in a derived class in the derived class
external: private base class, the base class protection can not be accessed by the public in the derived class can be accessed in a derived class