Publicly inherit a base class but making some of public method as private

// CPP program to demonstrate that all base
// class public functions become available
// in derived class if we use public inheritance.
#include <iostream>
using namespace std;

class Base {
    int i;

public:
    Base() {}
    void setBaseProperties(int i)
    {
        this->i = i;
    }
    void showBaseProperties()
    {
        std::cout << endl
                  << "i = " << i;
    }
    virtual ~Base() {}
};

class Child : public Base {
    int j;
    int k;

public:
    void setChildProperties(int i, int j, int k)
    {
        setBaseProperties(i);
        this->j = j;
        this->k = k;
    }
    void showChildProperties()
    {
        showBaseProperties();
        cout << " j = " << j << " k = " << k;
    }
};

int main()
{
    Child c;
    c.setChildProperties(1, 2, 3);

    // this exposed function is undesirable
    c.setBaseProperties(4); 

    c.showChildProperties();
    return 0;
}

// CPP program to demonstrate that some of
// base class public functions cane be restricted
// in derived class if we re-declare them with 
// "using" in private section of derived class
#include <iostream>
using namespace std;

class Base {
    int i;

public:
    Base() {}
    void setBaseProperties(int i)
    {
        this->i = i;
    }
    void showBaseProperties()
    {
        std::cout << endl
                  << "i = " << i;
    }
    virtual ~Base() {}
};

class Child : public Base {
    int j;
    int k;

    // Redeclaring scope of base class
    // functions in private section of
    // derived class.
    using Base::showBaseProperties;
    using Base::setBaseProperties;

public:
    void setChildProperties(int i, int j, int k)
    {
        setBaseProperties(i);
        this->j = j;
        this->k = k;
    }
    void showChildProperties()
    {
        showBaseProperties();
        cout << " j = " << j << " k = " << k;
    }
};

int main()
{
    Child c;
    c.setChildProperties(1, 2, 3);

    // if we uncomment this part of code, it causes 
    // compilation error as the function is private 
    // now
    // c.setBaseProperties(4); 

    c.showChildProperties();
    return 0;
}