Hello I have been trying to understand virtual functions for a while and when I made a program to demonstrate the use of virtual functions it didn't and someone gave me this piece of code that would demonstrate the proper way to utilize a virtual function:
#include"derived.h"
#include<iostream>
using namespace std;
int main()
{
class derived d;
cout<<"d.get_tag():"<<d.get_tag()<<endl;
class base& b= d;
cout<<"b.get_tag():"<<b.get_tag()<<endl;
system("pause");
return 0;
}Which went with the derived.h:
class base
{
public:
virtual int get_tag()
{return 1;}
protected:
};
class derived: public base{
public:
int get_tag()
{return 2;}
};I know that the person's example uses the virtual function correctly but I haven't the faintest clue what class base& b= d; means. Does it read "make a class base type object that is a reference to class d"? Thanks for any help.
