c++ pointer vector<base_class*> put derived class but sliced print - c++

Question

I'm studying for pointer and inheritance of C++.\
I made pointer of vector Employee class which has name and salary in it.
Also, it has print function which printout name and salary.
I made it virtual
virtual void print() const;
Also here's the implementation of function
void Employee::print() const
{
cout << "Inquiry Employee info..." << endl;
cout << "Name:" << get_name() << "\n";
cout << "Salary:" << get_salary() << "\n" << "\n";
}
In derived class, I added one more private data Department Name and override print function.
I put derived class in pointer vector, and tried to call the function on derived function.
However, it only calls the function in base class.
When I make derived class object itself and called that print function, it worked.
What should I change to make derived class object in base class pointer vector can call function in derived class?
Addition ##
#ifndef MANAGER_H
#define MANAGER_H
#include <string>
#include<iostream>
#include "ccc_empl.h"
#include <iomanip>
class Manager : public Employee
{
public:
Manager();
Manager(string name, double salary, string dept);
~Manager();
virtual string get_department() const;
void print();
private:
string deptName;
};
#endif
implementation
#include <iostream>
#include <string>
#include "manager.h"
#include "ccc_empl.h"
Manager::Manager(){}
Manager::Manager(string name, double salary, string dept)
: Employee(name,salary)
{
deptName = dept;
}
Manager::~Manager(){}
string Manager::get_department() const
{
return deptName;
}
void Manager::print()
{
cout << "Inquiry Manager info..." << endl;
cout << "Name:" << get_name() << "\n";
cout << "Salary:";
cout << get_salary() << "\n";
cout << "Department:"<< get_department() << endl << endl;
}

Answer 1

You haven't shown us the Derived class print function, but I would guess that you forgot to declare it const. Easy mistake to make.