#include <iostream>
using namespace std;

/// nu pare sa fie nici o diferenta intre "class cls2: protected cls" si "class cls3: private cls"

class cls{

private:

    int x;

protected:

    int y;

public:

    int z;

};

class cls1: public cls{

public:

    void mod(){

        ///x = 55;
        y = 66;
        z = 77;
    }

    void mod2(){

        cls ob;

        ///ob.x = 88;
        ///ob.y = 99;
        ob.z = 44;
    }

};

class cls2: protected cls{

public:

    void mod(){

        ///x = 555;
        y = 666;
        z = 777;
    }

    void mod2(){

        cls ob;

        ///ob.x = 888;
        ///ob.y = 999;
        ob.z = 444;
    }

};

class cls3: private cls{

public:

    void mod(){

        ///x = 5555;
        y = 6666; /// nu ar trebui sa fie innacesibil?
        z = 7777;
    }

    void mod2(){

        cls ob;

        ///ob.x = 8888;
        ///ob.y = 9999;
        ob.z = 4444;
    }

};


int main(){

    cls1 a;
    cls2 b;
    cls3 c;

    ///a.x = 11;  /// class cls1 : public cls
    ///a.y = 22;
    a.z = 33;

    ///b.x = 111; /// class cls2 : protected cls
    ///b.y = 222;
    ///b.z = 333;

    ///c.x = 1111; /// class cls3 : private cls
    ///c.y = 2222;
    ///c.z = 3333;

    return 0;
}