Reference to Dynamic Objects in C++

// C++ program to implement 
// dynamic objects
#include<iostream>
using namespace std;

// Class definition
class Test
{
    // Data members
    int a, b;
    public:
  
        // Constructor to initialize
        // data members of class
        Test()
        {
            cout << "Constructor is called" << 
                     endl;
            a = 1;
            b = 2;
        };
  
        // Destructor 
        ~Test()
        {
            cout << "Destructor is called" << 
                     endl;
        }
  
        // Function to print values
        // of data members
        void show()
        {
            cout << "a = " << 
                     a << endl;
            cout << "b = " << 
                     b << endl;
        }
};

// Driver code
int main()
{
    // pointer to object
    Test *ptr;         
  
    // dynamic object creation
    ptr = new Test;  
  
    // Accessing member through 
    // pointer to object
    ptr->show();     
  
    // Destroying object dynamically
    delete ptr;     
    return 0;
}

// C++ program to implement
// Reference to dynamic objects
#include<iostream>
#include<string.h>
using namespace std;

class student{

private:
  int roll_no;
  char name[20];

public:
  void setdata(int roll_no_in, 
               char name_in[20])
  {
    roll_no = roll_no_in;
    strcpy(name, name_in);  
  }
  
  void outdata()
  {
    cout << "Roll No is: " << 
             roll_no << endl;
    cout << "Name: " << name << 
             endl;
 }
 };

// Driver code
int main()
{
  // Reference to dynamic object
  student &s1 = *(new student);                        
  s1.setdata(1, "Ajay");
  s1.outdata();
  
  // Reference to dynamic object
  student &s2 = *(new student);                        
  s2.setdata(2, "Aman");
  s2.outdata();
  student &s3 = *(new student);
  s3.setdata(3, "Akshay");
  
  // Reference to static object
  student &s4 = s3;                                    
  s3.outdata();
  s4.outdata();
  return 0;
}