Simple inheritance example

box.cpp

#include "box.h"
#include <iostream>
#include <string>
#include <vector>

int main(){

	std::vector<int> vec;
	vec.push_back(1);
	vec.push_back(13);
	vec.push_back(15);
	std::string abc = "Hello";
	object obj(vec, abc);
	box bo(obj);
	std::cout << "String is: " << bo.re_string() << std::endl; 
}

box.h

#ifndef BOX_H
#define BOX_H

#include <iostream>
#include <string>
#include <vector>

#include "object.h"

class box: protected object {
public:
    box(object objects): object(objects) { 
    };

public:
	std::string re_string(){
		return object_name_;
	}
};

#endif;

object.h

#ifndef OBJECT_H
#define OBJECT_H

#include <iostream>
#include <string>
#include <vector>

class object {
public:
    object(std::vector<int> const& v, std::string const& object_name): v_(v.begin(), v.end()), object_name_(object_name) {}

protected:
    std::vector<int> v_;
    std::string  ;
};

#endif;