How to acces private member function in C++/CPP

How to acces private member function in C++/CPP
Program to show accessibility of private member function.
//private member function(skeleton) can be accessed using
//member function only and not by object and dot operator
#include<iostream>
using namespace std;
class item
{
private:
        int number;
        float price;
        void getdata(int a, float b) // here member function getdata
                                               //is private so not accessible by object
        {
        number=a;
        price=b;
        }
public:
        void showdata()
        {
        cout<<"Number="<<number<<" \nPrice="<<price<<endl;
        }
        void putdata()
        {
        getdata(10, 100.4); // private member function getdata
                                      // is called from within another m.f.
        }
};
int main()
{
item x;
//x.getdata(10, 10.5); // private mf can not be accessed using object
x.putdata();// private mf can be accessed using another mf only
x.showdata();
return 0;
}

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