#include <iostream>
using namespace std;
 
    class MyParentClass {
    public: 
        MyParentClass (int x=0) : MyInt(x) {}
        int MyInt;
    };
 
    class MyChildClass : public MyParentClass
    {
    public: 
        MyChildClass () = default; 
        MyChildClass (int x) : MyParentClass(x) {}
        MyChildClass (const MyParentClass& x) : MyParentClass(x) {}    
    };
 
int main() {
	MyParentClass p = 10; 
	MyChildClass c = 5; 
	MyChildClass d = p;
	cout << c.MyInt <<endl; 
	cout << d.MyInt <<endl; 
 
	return 0;
}

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