Program for derived class in cpp?

Answer 1

#include<iostream>

class base

{

int m_data;

public:

base(const int data):m_data(data){}

base(const base& cpy):m_data(cpy.m_data){}

base& operator=(const int rhs){m_data=rhs;return(*this);}

base& operator=(const base& rhs){m_data=rhs.m_data;return(*this);}

virtual ~base(){}

};

class derived

{

public:

derived(const int data):base(data){}

derived(const derived& cpy):base(cpy){}

derived& operator=(const int rhs){return(base::operator=(rhs));}

derived& operator=(const derived& rhs){return(base::operator=(rhs));}

virtual ~derived(){}

};

int main()

{

derived d=42;

}