#include <bits/stdc++.h>
using namespace std;
//Base class
class Parent
{
public:
int id_p;
};
// Sub class inheriting from Base Class(Parent)
class Child : public Parent
{
public:
int id_c;
};
//main function
int main()
{
Child obj1;
Parent obj2;
Child *pChild = &obj1;
}